Hello, GOG.
Here's a short story: I saw Fallout 3 on sale on Steam for $25 last week, considered buying it, decided I should play Fallout 1 first, went to GOG, bought and downloaded it, thought it was amazing, finished it in 4 days.
Now, I'm looking for other great PC RPGs, a genre which I never really paid much attention to. I've played Diablo 2 (loved it), KOTOR (same as D2), Morrowind (boring) and Neverwinter Nights (more than boring). I enjoyed Fallout more than any of them, though.
So, I come to you asking for more great games in the same vein as Fallout. Fallout 2 is the obvious answer, but I think I'll save that one for later.
Also, I know I could just go to a site like Gamerankings.com and see the highest rated PC RPGs, but I like to see some personal input before buying a game.

Why skip fallout 2? I would go for it, my favorite pc game ever hands down. Maybe try to find a copy of Wasteland?

Okay, so you want a good PC RPG... but NOT Fallout 2... in the same vein as Fallout 2.
Why not try Arcanum: Of Steamworks and Magica Obscura?
http://www.amazon.com/Arcanum-Steamworks-Magick-Obscura-Pc/dp/B00004TTHT/ref=sr_1_1?ie=UTF8&s=software&qid=1247088465&sr=8-1
It's a game produced by Troika, by some of the same people who worked on the Fallout series. It's a much bigger game than Fallout or Fallout 2, and there's so much material in it that I can't even really describe it. It can be played in turn-based mode (complete with Action Points) or in real-time mode, and I found it fun enough to play through it all twice (once with a human diplomatic guy and once with a big, dumb ogre warrior who couldn't speak properly and who suprised everybody by being the Chosen One).
The game is set in steampunk-y world where there is a running conflict between the forces of magic (that which alters the laws of nature) and the forces of technology (that which controls and exploits the forces of nature). You're dropped out of the sky (literally) into this world as a person who has unexpectedly become the Chosen One, a hero destined to save the world from a powerful evil.
The game has its flaws; it's really hard to play certain kinds of characters, there's a ton of combat that you can't avoid, and fire elementals will literally melt all your equipment before you can say "What the hell, man!? That was expensive!" But I think it's a great game anyway, and I think you'll find it addicting in spite of its flaws in much the same way that Fallout is.
EDIT: Don't take my preferences as gospel truth, though. I enjoyed Morrowind AND Neverwinter Nights.

I highly recommend Vampire the masquarde Bloodlines. It's a little rough around the edges but as an RPG its fantastic. Just make sure you patch it at least to latest offical version if not get the unoffical bug fix patches as well.

I would second this but if you really want to play more RPG games I would suggest the classic DnD rpgs people always loved like Baldur's Gate 2.
If you get Vampire, you must patch it no matter what since there will be game breaking bugs that will ruin the game experience. I remembered I had to use console to get past this one part in the game, ugh!

Try Gothic 2 + Night of the Raven. One of the greatest games I've ever played.
http://www.gog.com/en/gamecard/gothic_2_gold_edition
That''s value for money. You can't go wrong with this one.

Alright, thanks for the suggestions. I'll see if I can find Arcanum, Gothic and Vampire. I'll definitely add the others to my "must check out" list.
Thanks again :)

If you liked Diablo 2, then you WILL absolutely LOVE Sacred Gold. More classes, more races, more EVERYTHING. Oh and you can ride a horse (except for the dwarf for some odd reason).

You can't go wrong with this suggestion probably the best one of all some great titles.

The best game to play after Fallout is more Fallout :).
The true beauty of the game is trying different character builds and seeing what plays out differently. The options are so diverse !:)
For example, I'm almost finished my current campaign (as a weakling doctor/scientist build) and I am already thinking about a new build.. for a Cowboy! :)
The plan: High strength/stamina, low charisma (he is gruff!), takes the "bonus to single handed weapons" trait.. and I will tag small guns, unarmed (bar room brawler!) and gambling maybe (role playing, you know..) He will only use single handed guns.
Should be a lot of fun !
Fallout. The possabilities are endless.

Imo Vampire the Masquarade Redemption is better than Bloodlines.

I just downloaded Fallout. Loved the third, and I have been trying to find other old RPGs to play (I have only recently begun to like RPGs and I'm hoping to try some of the old classics). Is it worth getting Baldur's Gate, its expansion, Baldur's Gate 2 and expansion, Icewind Dale and expansion, and Icewind Dale 2 for $70 from Amazon? Also, does anyone know where I can find a cheap copy of Planescape: Torment, because it sounds really good.

It's sort of worth it but if you can find an Infinity Engine games collection that includes Planescape Torment along with the other games you listed get that instead. Planescape alone goes for like $50 US on eBay and the like...

I loved Baulder's Gate 2. (never played the 1st one though). The KOTR was probably the best modern day RPGs i've played. Oblivion/ Morrowind had great plots, but got borning easily (instead of rewarding experience for kills, you got experience after playing for a long time... a big downside in the game in my opinion) The loot became repetetious as well and you you could never sell the loot for the true value... the max you could sell for was like 1000 bucks, maybe 1200 for every item you found (you could increase this later, but it wasn't worth it)
Anyway, I love GOG since it gives me the opportunity to play the awesome RPGs that i've always heard about. As a kid, the only rpgs (really more action oriented I think) I played were the Lucasarts Indiana Jones series and the Monkey Island sereies. LOVED THESE. I've always enjoyed RPgs that included some humor, especially quirky humor in it. Baulder's Gate 2 definitely had this as well (Give Minsc the talking sword and your laughing the whole time) Ah fond memories :)
Btw, I should mention i'm playing the original fallout now for the first time. Quick question, I know Planescape: Torment is supposed to be freaking awesome. Anybody heard any news as to whether GOG or Steam might be getting this? The cost for the hardcopy these days is obscene.....:(