Movies: passthepopcorn (although most movies are in shitty Xvid 700MB rips, im looking for something better)
Music: waffles.fm (i heard what.cd is better, I'm looking for an invite)
TV series: demonoid (because i dont know anything better, anyone does?)
Games: BitGamer
Anime/Manga: BoxTorrent (outstanding tracker! great quality always)
Applications: demonoid (because i dont know anything better)
Hentai: i'm not a faggot
Western Porn: i'm not a faggot
Asian Porn: AkibaOnline (public)
Everything else: Demonoid (when everything else fails. Yeah, it's a piece of shit, the site is a mess, the torrents are a mess, the ratio is never counted properly, but its so fucking popular that you'll find anything you don't find elsewhere and always get good speeds. you need to be careful about shitty bitrates and stuff)
And if even Demonoid fails, i go with Torrentz.com (it searches through public trackers like The Pirate Bay, mininova, etc)