It all depends on what you want. Do you like darker, more mature games, or fun, more happy go lucky games? I could give you loads of the former, but I'm not too good with the latter.

But for the moment, I'd say go with Katamari Damacy. I think almost anyone can enjoy it, it's only 20 frickin` bucks, but it may not be too easy to find. I don't know.

Good luck with this; it sucks to be bored, but eh. =D