ICO - I can't really explain why I don't like this game. but it's mainly because of the total lack of narrative and direction. I also found it really frustrating in places.
Gears of War - The campaign is far too short and repetitive and there are better online games to play right now. It's not bad, but graphics are the only thing that was actually great. Not worth the high scores in my opinion.
Resistance - One of the worst shooters I've played this generation. If it wasn't bundled, I doubt it would have sold a fraction of its current sales.
Super Smash Bros Brawl - I finally picked this up recently and all I could think about was how overrated this game was. The only time I've truly had fun was with friends over. The Subspace Emissary was boring; in fact all of the single player content was boring and the online component was regularly unplayable due to lag. I've never played any of the previous games before so I guess I may not have gotten into it yet, but I'm not buying into it so far.