Bittorrrent programs are not usually easy to use or they are not very attractive. Azureus has solved the problem.
Azureus is Java based that offers multiple torrent downloads, queuing/priority systems start/stop seeding options and instant access to numerous pieces of information about your torrents.
The only bad thing of Azureus is that it needs a really fast machine to run fluently, if you do not have at least 1B RAM an 3.o GHz probably it will run a bit slow.
You will need the Java Runtime environment. If you do not have it, you can download it here.