Originally Posted by ViraL

For somebody who loves HD quality this is the tracker to join. They have every torrent in HD quality. Movies, TV, porn, documentaries, sports and more. It's not hard to seed and their bonus system makes it even easier to maintain a good ratio. Their featured torrents (25%, 50%, 75%, 100% Free Leech) also help to boost your ratio.

Really their bonus system is not useful at all in making upload ratio, still you have good chances to make big buffer through uploading, cross seeding and downloading their internal encodes.