Games mostly. Movies secondly. I don't really look at the art or music sections although I probably should. Also forums.
For games/movies favorite anything you'd want to play again. Other than that, I like to click on under-judgment titles that seem like they'll either be really bad or really good. Sometimes what I clicked thinking it'd be a "really bad" pleasantly surprises and turns out to be a really good.
And of course some artists are just amazing. The few gems are worth sifting through everything else, IMO. And of course everyone has different tastes. I'm probably not going to think too highly of a castle defender type game for example whereas that may be someone else's favorite type of game. I try to be fair on the judging though so if it's a kind of game I just flat-out don't like (genre-wise) I tend to abstain from voting. Usually. You can probably find exceptions.