I hate MMOS.
Way too shallow and filled with elitist scum.
Also they are a hacker/scammer playground.
I need an immersive and distinct experience.

An interesting question:

Is there any MMORPGs you really wish were single player games and I mean in lore and setting.

Sports games are up top as worst, for me. I'll only play if it's with friends or family and we're all in silly moods — and even then there are plenty of multiplayer games that I'd choose over sports.

I *hate* MMOs with a passion. I love multiplayer games when I'm actually in the room with people or playing online with people I know, but I hate the commitment that inevitably arises to strangers (I'm antisocial online, I guess), and don't even get me started on the freemium model. Besides, they're too much of a timesuck for my liking. I also dislike FPSs, because my reflex times in first-person suck and they've rarely got stories I'm all that into (plus, online multiplayer - bleh). Willing to be turned around there, though, and I think if I do ever get my hands on Fallout 3 it might help.

For me, RPGs (in all flavours), strategy games, adventure, and hack n' slash are my quartet of awesome.

Eh, maybe? Honestly I get turned off MMOs too quickly to know whether or not I would like them in the singleplayer space — takes a bit of play to get an understanding the lore etc. WoW might be a contender (the setting is pretty stunning, and so expansive) and *possibly* EVE, but I have no idea really.

Action rpg's and isometric hack n' slash's are my favorite, occasionally I will play strategy games such as the Civilization series as well.

Puzzle games, MMO's, and FPS's are my least favorite, I'm not quite intelligent enough to solve difficult puzzles and usually end up looking up guides. I find MMO's boring and I have a slow connection so the lag is bad. For FPS games it's not that I don't like them but that I am bad at twitch gaming and aiming.

Kinda depends on your definition of genre, but I'm not much fond of sports games. Racing games are a close second, and overly timing-based puzzlers are just annoying.

I admit this is also my problem. Yay, satellite broadband in the arse-end of Australia!

RTS - i am a bad gamer, but i REALLY bad at rts - but if not before, my new years resolution will be, to play different genres and get equally bad at them all :)

Random order:

Sports games: This is pretty much the only genre where I would really go so far as to speak of hate. I hate watching sports on TV, I hate playing team sports and I hate playing sports games. Simple as that.
Notably exception: Nintendo World Cup on the NES. Because it's just fun to beat up the completely helpless bots.

Racing games: Pretty much the same as with sports games, but there are a few more titles I enjoy. Mario Kart is always extremely fun and addictive if you're a group of at least 3, and I loved the older NFS titles.

Fighting games: For me it's just pointless memorizing of combos. I can play a few rounds with a friend, but it quickly becomes boring.
Notably exception: Super Smash Bros., because it has a completely different, and actually fun, gameplay.

Beat 'em Ups: See Fighting games, the same thing more or less aplies here as well for me. Just never could get into it.

Business simulations and City builders: Just boring and tedious instead of fun. No action, no story, no characters - just micro- and macromanaging.
Notably exception: Tropico, because I always wanted to be the dictator of a banana republic. I didn't enjoy Tropico 2, just because they made it a pirate setting.

Turn-based games: Too slow, and the combat system is often very tedious. I also think real-time systems are generally more immersive, which is something that's pretty important to me. To be fair though, I do like som turn-based games and I recently warmed up a little bit more to it - but if I had a choice I would still prefer real-time mechanics every time.
(This also includes faux real-time like NWN for example.)

MMOs: I hate online multiplayer and like most people already mentioned, it just feels like you never accomplish anything. Because of this reason, there is never a real story, and everything in it (the game mechanics, the behavior of other people, the HUD) make it pretty much impossible to immerse yourself in the world - so yeah, MMOs look like a great concept on paper, but I've never seen it work.
But to be honest, I've only played ones that tried to emulate the WoW gameplay. Maybe I would enjoy the ones that do it differently (like Guild Wars 2 or EVE Online) more? I don't know, but I'm not eager to try, to be honest. I also don't like the thought that a game wants to milk me after th initial buy, even if it's only non-essential items to buy. If I want a game, I want to own it completely.

Point and click games.

I'm just horrible at them.

This thread should have started with a survey, that would have been interesting.

Anyone up for it?

Sports games are the worst, i really don't see the draw in them most of all given they are pretty much the same game over and over with a slight change and upgrade here and there.

Thats the thing though, you don't have to keep updating, just keep the one you have for as long as you like until a real change happens to warrent a switch.

It occurs to me I have a 2nd least favorite genre: adventure games.

I like them in principle, however I tend to get stuck, and after a certain amount of time walking around aimlessly trying to figure out the gaming designers logic, giving up and playing something else.

Hence why when I saw Telltalegames 80% I was very excited, but then decided "no, i already have quite a few unfinished adventure games"..and abstained.