I never really liked, in fact, I hate side scrolling levels. I seriously do. My least favorite levels in Mario 2D plat formers are levels that move and force you to go along the path. It's bad enough I got to find and collect six large Yoshi coins to unlock secrets but then you're gonna force the level on me so I have to play it through twice as much to memorize where they are? ASS!
Beast Mode in Bloody Roar 4. It baffled me why they changed it from 3. It's like the best strategy was to immediately go Beast so that you don't lose health when being hit, then when you lose all beast gauge and get that ass beat as a human, turn back into beast before you die to extend your life bar. Unless you where winning, supers where meaningless. Course, that game was just bad all together. ASS!
Arcadey-Sim racers. Why? Project Gotham Racing is prolly the closest to getting it right and even then I didn't enjoy it. People love Burnout for it's arcadey ness. People love Gran Turismo for it's Simy ness. People don't like NFS Shift for it's sucky driving mechanics. Least I don't. ASS!
Adding features and then taking them away. Example. I like Halo 2 and dual wielding but why they decided to removed that game play mechanic and future releases like Reach? Instead of trying to be Halo 1, be better. ASS!
Tacked on multi-player. ASS!
Sonic going lycanthrope. No... ASS!
Shooting in Sonic games. ASS!
Super Smash Bros: Brawl. Oh this one is going to be EPIC! Before I mention this, though, I would just like to say...
FUCK YOU, SAKURIA!
Yes I'm talking about "tripping" at random. ASS!
Mineral Scanning in Mass Effect 2. It's only tarnish, IMO. ASS!
The sequal of a game that takes away all your powers from the first game. WTF? If memory serves, Banjo-Tooie let you keep all of Bear and Birds moves from Banjo-Kazooie and then added more. So how do we forget moves? Samus, seriously? You lose and re obtain the same powers every game! Keep yo shit on lock, bitch! ASS!
Ninja Gaiden suicide enemies. Fuck them. Especially Ninja dogs... ASS! That actually did bring challenge to the game and I might just be raging on that one.
A.I. Partners that just stand there. I'm looking at YOU Sheva of Resident Evil 5! I gave you a mother fucking TMP for your to spray some crowd control not to sit there holding it as you decide how close you want ONE zombie to get before you lay lead in his head and shoot it while it's down! ASS!
Default Inverted controls; and more so, LOCKED inverted controls. No, most of us are not pilots for air craft. Should never force anyone to use inverted Y-Axis. Down means down. ASS!
Invulnerable rejuvenation states. Specificly regarding to Yakuza 4 with the last Side Story you had to fight bosses that became invulnerable to damage and recovered health in heat mode while also not flinching to attacks. That's some bull shit, Sega. ASS!
All I can think of for now.