http://www.torrentday.com
It's a private tracker and they are closing sign ups at the end of the month. I cannot recommend it highly enough. I have used a few private trackers in my time, but torrentday is the only one I have stuck with.
With all private trackers you have to keep up your ratio, but TD gives you "points" for every hour you have one full/completed torrent available for upload - so if you have 20 torrents running over night, even if noone is uploaded off you, you will get 20 points an hour. They can then be exchanged for upload credit. (they also run double upload credit on donations from time to time - for about £6 you get 20gb).
Good for everything, except sofware really. But games and movies are sound.