I like GTA 3 and Vice City was good, but inferior to 3 and San Andreas is very disapointing. Dull world (most of it is desert, forestry and water) and all the extra bits they'e added on detract from the game. Why would I play GTA to chav up my motor or parachute?
I don't know if it counts, but I dislike stealth sections in games. They're okay in a stealth game, but if I play GTA or a platformer I don't want to be forced into doing things stealthily. On hitman 2 I got mass murderer on every level, I went out of my way to kill everyone (excluding those you cant, such as the generals) and slaugtered the civilians. So, excluding shenmue, I hate games where they force you to be stealthy.
Also, Final Fantasy and MMORPGs. And the catacombs from RTCW. And those sections where you are in a forest/room of portals and have to get the right order by chance. Anyone play on Icewind Dale 2? There is a forest where you have to go through the right entrance out of 4, about 10 times in a row, and all the places bar 2 are identicle. You cant even dump stuff on the floor to distinguish where you have been as it will disapear. I don't think this was possible without a friend knowing the answer (he probably used a walkthrough himself) or having NO life whatsoever.
Also mirror puzzles are shit.