What is your favorite torrent program?

I was just wondering what people out there like to use as their torrent program. I personally think uTorrent is the best, I like the interface and it is asthetically pleasing. What is your favorite program, and why?

I am also wondering, what do you look for in a program in general. Fuctionality over ease of use? Looks over features?

If you too use utorrent one thing I noticed is that it lacks a history function, so I made my own program to help out.