Metro 2033 - Stealth is just tacked on yet still feels required in some portions of the game, leading to much frustration.
Singularity - Health system seems needlessly oldschool. I love medkits, don't get me wrong, but I think if you are going to make me rely on collecting items to heal that you should make me a little bit more durable. Call me weak, but I don't like being cheap-killed in my games.
The Saboteur - So many great ideas in this game that just kind of fail due to lack of attention to any of them. Jack of all trades, master of none and all that bullshit.
Crysis 2 (MP) - Why, dear god, did we need to map sprint to the energy source? It basically kills all usefulness of it other than getting to the fight. Those times when my suit is energy-less are usually the times I need a quick escape the MOST.
Super Street Fighter 4 - While all other games are trying their hardest to be as accessible as possible while still catering to the hardcore, how the hell am I supposed to ever get better at this game? I can run trials and training to learn how to play, but everything beyond a glorified interactive move-list is just a crapshoot. I really wanted to learn to play this game, but when my only choices are 'get ass kicked online' or 'get ass kicked by AI', and I am given no other way to improve my game, it makes it hard to want to continue playing.
Darksiders - Zelda works because battles are short and sweet. I do not want to spend 15 minutes mashing combos just to clear a bunch of bland enemies from a room. Your combat is good, but not so good as to make me go "OH BOY! ANOTHER ARENA BATTLE!"