Here is my list of top five best torrent sites
The Pirate Bay - This is probably one of the biggest or the biggest public torrent site, if you want movies, music, apps you will probably get it here and there are almost always have seeder.
BitMe - You won't find any pirated softwares here its all about learning torrent, there are very wide selection of torrent available from love making to learning a new language to business management to computer programming to ancient history, too bad not everyone can access it as its a close torrent and invitation are very rare these days.
Demonoid - Their still big, they did closed for a while after they were raided, but their back and their still good and reliable source of quality torrent, you will need an invitation code to sign up for an account.
Mininova - One of the biggest public torrent
Avistaz - Best source of Asian torrent on the web..
Check them out.