I played Halo on a exhibition disc and loved it and picked up the full game but I just didn't "get it". Halo's certainly not crap but it just wasn't for me.
Top Spin 2 dissapointed me. I HATED Top Spin 1, so I downloaded the Top Spin 2 Demo just to laugh at the game and ended up LOVING it. I ended up trading Burnout Revenge for it and found out I had more fun with the demo
. Prey and Condemned dissapointed me too, not as good as their demos. Call of Duty 2. None of those games are shit, but just wherent as good as the demo to me.