I don't really hate genres but I do have my preferences.

I don't play sports titles, not even kiddy ones like Mario Tennis or arcade ones like NBA Jams. I never saw the point in playing sports titles, it is just better to go outside or head to a rec. center and see if you can get some other people to play the real sport.

Racing Games, I have friends who play these so I do partake every once in a while but I've never cared for them enough to buy any. I don't even like racing games as mini-games in other types of games so why would I buy a game that is nothing but racing?

FPS - I never really saw the point of shooters and while I've been assured they have deep mechanics, I can't get past the idea of them all being you wandering around shooting things that are shooting you, and how utterly trivial and boring that sounds. Once again, I have many friends who play the genre so I do partake occasionally but each time I do just reminds me why I never liked the genre.

Sandbox games/open ended WRPGs - I know this sounds really weird coming from a guy who constantly cries for more choice and options in RPGs but I seriously can't stand true sandbox titles or even open ended WRPG styles where the main story is practically optional. I need some form of structure with a clear goal, otherwise I get incredibly bored very fast. GTA is only fun with booze and friends, I've never found the games on their own merits to be fun as a single player experience. The stories often feel like rehashes of movie plots and once you've gone on a few bloody rampages with car chases and explosions, it loses its luster really quick.

I also don't care for the Morrowind approach of WRPG cause it always feels weird that the main quest is optional and often times less interesting than the side missions and quests. I'm 60+ hours into Fallout 3 and only recently got to the radio station which is like the third objective in the main story. The fact that navigating the ruins of D.C. is more of a chore than fun since it all looks the same has pretty much deterred me from finding the radio dish the guy wants so I may never see the games real ending (of which I hear wasn't rally all that great to begin with). I also feel these type of games generally have weak story telling and I've never felt like the character I created really does anything other than being a mute death machine who occasionally answers a yes or no question. The games ultimately fail to create an emotional experience that brings forth an immersive and human element to the game. If I truly wanted to create my own character and role play as them, I would rather just call up a few friends and pull out "Ye Olde Quill and Parchment" books and have some real RPG fun. At least then I can actually make it clear what kind of an asshole my character really is with terrible one-liners and all.

Granted I don't hate any of these types of games but I never actively seek them out to play.