I was on µTorrent for a long time on a really old build (like 2.2.1) because it got even more bloated and crappy with every new release, especially over 3.0. I realized, aside from missing new features and stuff, it was probably a security risk being that far behind. I made the switch to qBittorrent and never looked back. It basically took everything I liked about that old style build of µTorrent and brought it into modern times.