I could never bring myself to finish the first chapter of the OC of Neverwinter Nights. I loved the first expansion and many of the user created modules... But the OC was just bland... Though I recently started a new play through again... Hopefully I will be able to make it out of chapter one and find it picks up...
Also... I haven't felt the urge to play Fallout recently... Last time I played I finished the waterchip quest and the next main quest line seems to lack the urgency of the first quest... I think the time limit had a lot to do with that.
I tried to play LOTRO, but I find the combat system to be even more boring than WoW and I wasn't able to stay interested long enough to really ingrain myself in the community of the server I chose. The group of friends I made in WoW is really the only thing that keeps me logging into that game still.

Did it have a timer displayed in the Pip boy as the first quest did?

Oh wow, where to start... Here are some from the last few years:
Armed Assault. I loved Operation Flashpoint and was excited about ARMA, but it didn't help that the PC I had at the time was barely above minimum requirements so the game ran like shit. Also I bought the U.S. version via EBAY and was pretty annoyed with the fact that all the cinematics between levels were replaced by stupid narration.
Final Fantasy 7 & Parasite Eve. Between the "selecting items from a menu" combat system and the constant random encounters my patience ran out very fast.
Silent Hill 4. Actually got pretty far in this one, up to the point where you have to run away from an unkillable enemy while still collecting key items and making sure your sidekick did not die as well. Can you say needless frustration.
Yakuza. The constant loading hiccups and the pointless wandering, sidequests and encounters pretty much ruined it for me, despite the fact that I wanted to know how the plot ends.
Project Zero 3 (A.K.A. Fatal Frame 3). This is the only one in the list I might get back to. I'm a big fan of the series but the broken rhythm of the game (you constantly "wake up" and need to "go to sleep" again to go back into the haunted house) as well as the fact that you can't see the enemies health bars made me abandon this after about 1/3 of the game.
P.S. I'm kinda interested in selling ARMA: Combat Ops It's complete and in almost mint condition. Any takers?

First of all, I've skimmed through this topic, and I noticed that a lot of you mentioned games like Assassin's Creed and Fallout. I'm going to go Nintendo here, so no one bash me for being a casual/kiddy gamer, k? >_>
(The games I'm about to bash also aren't PC games.)
I personally tried WoW, and I'm not going to degrade the people who claimed it was bad, but it's the kind of open-ended RPG that's supposed to have no goals. You get the feeling of 'gaming-achievement' through completely optional quests, and the real fun is PvP, dungeon running, and socializing, just like in most MMORPGs. Some people (like me) will love that, others will hate it. I do agree that it's not worth the 13-15 bucks a month unless you're crazy about that game, though.
Now to the games I was going to complain about. Personally, Legend of Zelda: Phantom Hourglass for the DS bored me. I'm a hard gamer to bore, too, if you can call me a legit gamer at all. The game itself was not boring, just that everything...had....to...be...repeated. Also, if I can make it through a game the first time without actually needing to think, or in lazy situations, consulting a guide, it's an easy game. Too easy.
Pikmin--semi-old game for the Gamecube that was critically acclaimed--was something in which I really tried. It was innovative and nice-looking, but two words: repetition and time limit.
While I'm still here, can anyone who's played Fallout tell me how generous its time limit is? I know a patched version of it extends the limit to four hundred ingame days or something, but that many hours is that in real life? Also, it's rated M, but I heard that it's possible to turn down the gore. You can probably tell by the kind of games I buy [see above] that I'm not really a huge fan of murderous games [save a few exceptions].

I managed to get every Final Fantasy game up through 9, including side games like Tactics, Chocobo's Mysterious Dungeon, that cart racing game (can't remember its name)... and I've yet to finish a single one of them. o_O
The closest I ever came was being at the final save point for the final boss in FF 9... and the next day I got my first PC (parental hand-me-down), and discovered the Internet. Never quite got around to finishing that game to this day.... <_<;;
I beat Grand Theft Auto 3 and Vice City, on the PC, many times over, and looked forward to San Andreas. I even managed to get some pretty decent stats, lots of weapons, most of the houses... but the incredibly frustrating Plane controls made me totally give up on it. I even tried using a PS2-style controller (bought solely for this game), and, though it helped a bit... plane controls were far too squirrly for my older reflexes, so San Andreas was relegated to the big ol' box-of-uninstalled games I have. :(

Alone in the Dark 2008 for the PC.
I got really into it and pretty far along...even despite some annoyances I eventually got through, such as 52nd Street Level and some annoying no-camera control (with analog stick for my X360 Controller for Windows) in 3rd person viewpoint.
Just when it was all going fine, I just put it down when I got to the "root burning" level -- which you MUST finish to be able to "unlock" the last few episodes.
That is the most tedious level in gaming I've seen in years -- after 1 hour of it, I just put it aside.

I can agree with you there. I finished the game once, and tried many times to play it over again... but it's so drab that you really get offed by the time you finish the beginning.

In regards to the OC of NWN....
Chapters 1 and 4 were my fav's.
I didn't like Chapter 2 and 3 too much at all.
The whole ancient race thing was just poorly written and rushed, if you ask me.
The Aribeth stuff with Fenthick was a lot more interesting than the Morag crap.

I feel your pain. I completed GTA3 + VC a few times on PC, but had to give up on San Andreas once I got to the 'Learning to Fly' missions - I just couldn't do it with a keyboard.
That was so disappointing.

Halo 2 and 3 - Only liked the first entry, and even then only the PC version. I just can't play these games unless my friends come over and force me to play Halo 3 with them. And even then I just goof off or make remarks about how crappy the game is. Surprisingly I almost always win.
GTA:SA - Like everyone else in this thread, I can't stand this game. I loved Vice City, but this one I just couldn't relate to like I could with Vice City (I live in Miami). I absolutely hate rap and hip hop and the whole culture that comes with it. The way the characters talk and act just disgusts me and overall the game feels like it has no soul at all unlike the previous installments.
Basically, an assload of console games.

So I misinterpreted this thread as games you couldn't FINISH... But I only realized my mistake after writing the following, so here it is anyway:
Pikmin 2: The first Pikmin was an amazingly great game -- sort of Nintendo's take on RTS with plenty of puzzle solving mixed in. P2 felt more like a dungeon crawl, with no puzzles and became repetitive too quickly.
Zelda Phantom Hourglass: Started off great - amazing graphics, story etc. But going back to the Temple of Time over and over burned me out rather quickly.
Star Craft Brood War: I'm not good at RTS's. Though I like SC:BW, I just get too frustrated to finish. I will one of these days.
Baldur's Gate II: This is probably the most embarrassing, given this game's renown. In Chapter 5, I made a game-breaking mistake, and didn't have a previous save. All those hours gone made me lose my spirit. I plan on soon going back to play this through.
Morrowind: Same thing as with BGII -- bug forced me to lose ~40 hours of gameplay, and I couldn't start over.
Myst IV Revelation: I was able to beat Myst I-III without TOO much difficulty, but IVs puzzles really baffled me. I was looking online for help so much I wondered what's the point.

Deus Ex, at least two dozen times. I just don't like the game. Sorry.
Planescape: Torment. Played it up to Typhoid Mary, but I was mostly bored the whole time so I uninstalled it.
World of Warcraft. Played during the beta and was not, um, wowed.

Avernum-Escape from the Pit: Low experience gain was annoying but what took the cake was the fact that your fighter/rangers cant hit a thing with their weapons. You will go through most of the game just avoiding fights and proceeding to areas where you can fight enemies, only to ricochet back to areas where you can hit.

Because of that, i cant even rate this game up there in playable category. Others might find that to be fun but i think that is fucking retarded. The avadon series for this part, is much more playable as you can enjoy the experience as is the geneforge series which i love.

I highly doubt that i will play any of jeff's other 1st series remakes along with this as he is not making the game really feasible. If anything this is another reason why i like the 2nd avernum series more. Who cares if those games are linear, they tell a good story and you can enjoy the experience unlike the former.

Braid.