I feel ya for L4D.

I think I played the online demo for 6 or more hours, I really got into it. But when I bought the full game.. I guess it just lost it's magic for me.

Also Prototype, I bought Infamous first and absolutly loved it, then bought prototype, just could not get in to it, Infamous ruined me. I think Infamous is one of the most under rated games also.

Oblivion and Sonic games since Sonic Adventure.

Yah it gets old real quick Left for Dead.

Quite a lot of games these days, some of them are really good but they're just to easy to enjoy(assasin's creed and Fable for example). Other times the overall style or setting just ruins it for me.
Wanted to like Mario Galaxy but didn't like the Galaxy part, Bayonetta seems like a great game but it's to girlish(or Japanese) for me. Killzone 2, Resistance...

Maybe i'm just getting to old to really get in to a game anymore

Super Paper Mario was the big one for me this generation. When I first bought it, I only had a couple of Wii games, and I had been a huge fan of the Mario RPG series since the iteration on the SNES. So even though I knew it wasn't exactly like the previous Paper Mario games, I bought it. I wanted to like it so much, but I just couldn't. The RPG elements (the leveling system, the allies, the turn based battle system) were all either gone or only a mere shell of their former selves. The great humor and atmosphere that I loved in past games was gone. It was still good, but not what I had come to expect from the series. And overall, it was one of the games that made me so discouraged in the early days of the Wii.

I will always hate you Super Paper Mario, you sellout whore.

I don't allow myself the option to dislike a game I want to like. If ever the occasion arises, I simply take the punishment route. There's been nights... nights where I've done horrible things to myself because of this... Once I even subjected myself to Chinese water torture!!! For 3 days I was chained to that table. When the ordeal was over, you'd never catch me say that MK Wii was a major letdown (even though it was and is...O shit!!! What have I done?!? Better get back to the table!!!)

Super Mario Galaxy.

I wish I could appreciate the game but I just can't. I completed it and tried it again but nothing happens. I'm not having fun.

But I liked Sunshine. I haven't played in a long while though. Maybe I'm just getting too old for this. Some people will keep the interest even when they grow up but it seems my tastes are changing.

Oh God, this too. I mean, I'll probably finish Prototype at some point, but talk about disappointing. When this and inFamous first came out, all I heard about was how Prototype had better gameplay and was a more enjoyable game. What a crock. Everything about the game is unpolished and unresponsive and ugly. The story and pacing is horrible. The gameplay gets repetitive quickly. But since it was a gift to me, I suppose I'll complete it. Still...

Super Paper Mario *sigh*

I agree.

I felt stolen when I bought Super Paper Mario. Not what I expected at all and I had high expectations.