Does anyone have any good suggestions for PC games for someone who likes rhythm games, games you can play casually, or RPGs that are a bit more linear than open? I enjoy playing games, but I don't have tons of time to devote to most of the more complicated ones (I prefer to watch other people play them). It might also be interesting to find any games based on White Wolf's World of Darkness (with all its problems, it's still one of my favorite settings to role-play in). My computer runs Windows 7, but I've been having some stability issues, so things that aren't huge resource drains would also be good.
ETA: Thanks everyone! I think I'll start by checking out Audiosurf, then maybe I'll look into Vampire :)