Assassin's Creed 2 was pretty fun and interesting but once I finished it I couldn't see myself going back to it like ever again.
Mass Effect 2 was pretty epic on my first playthrough, I started a second playthrough on the hardest difficulty to get my last achievement and I became severely bored and quit midway through.
Now with Super Street Fighter 4 I experienced results within the first couple of days, I'm into alot of genres and most of the fighters I've played are pretty fun like Soul Calibur 4 and Tekken 6. I'm not new to Street Fighter at all but for some reason this game really isn't built for me at all, I think its a mix between the massive learning curve and lack of achievements popping up. In the end though SSF4 should only be bought buy people who know they're gonna playing this for a long time.