I'd rather not go by games I've tried for Wii, PS2, Xbox, and Xbox 360, because if I don't recall them immediately, then that means I successfully repressed those awful awful memories out of my mind.
Instead, I will go by games attached to my Steam account, being that PC is now my main if not only platform and I buy all my games off steam.
Bioshock: I'm sure it's a FANTASTIC game, and I REALLY wanted to like it, and I was very impressed until the combat came it. It was very stale, boring, and repetitive. You hit things until they die while you lose health. It was boring and repetitive, and I dealt with it for a few missions because I wanted to like it until my boredom exceeded my limits and I died. Didn't have the interest to keep going. I think I will give it another chance soon enough, though.
Blacklight: Tango Down: The enviroments and visuals are stunning, and I was fairly impressed, but the AI is very boring. They run fast and go to cover, but they hide there for minutes at a time, and pop out for a few seconds, hit you everytime, and go back into cover. Which is good, but if you don't hit them enough, you have to wait for them to pop out again, keep in mind like 10 people at a time, and it's pretty boring. It gets to a point where it's just like whack a mole with guns.
Call of Duty Black Ops: I'm going to be honest, this is pretty self explanatory. Call of Duty 2 and 4 were very impressive, showing pretty good design and interest from the developers. MW2 felt more watered down and tried to be more impressive than it rightfully was and kinda let me down. Well made game, none the less. Black Ops was like that except taken to a whole new level and from a dev team I had just started to respect with World At War. Black Ops was a little depressing to me.
Dogfighter: Controls are completely terrible and the whole game is just boring and not fun. I really like the levels though, the visuals are pretty cool, but the team could have done a WAY better job.
Kane and Lynch 2: Dog Days: Holy christ, where do I start. When it came out, they did a TON of advertising and put out a ton of dlc, I assumed it was going to be popular and good. I knew there have been a few Kane and Lynch games and thought it might be a good game. It was on sale for 5 dollars so I thought, why not? The game, from the start, is uninteresting, the story was uncompelling, and the gameplay was awful. You spend the entire time chasing after someone while getting shot at by everyone. So you have to chase these guys, either stop, kill everyone and run, which isn't even fun because the actual gameplay is pretty damn bad, or you can just sprint past everyone making so you just sprint after them. You can't lose them either, they stop after a while for you to stop. It was impressively bad. I actually regretted spending 5 dollars. I would have much rather spent it on some tacos or something.
Sniper: Ghost Warrior: Seriously, if you don't know by now, read ANY review. The game is just boring. It looked cool and seemed like there was some fun to be had. There's none. What so ever.
Sorry if I wrote a lot but whatever.