* getting around arbitrary region restrictions (that use case is rapidly disappearing)
* protecting myself against snoopers when on public WiFi. I'm very mobile, and often work from cafe/hotel/airport WiFi. They're mostly in the clear, but I VPN even over encrypted WiFi because of the below.
* I don't like ISPs selling my information. The service i use is fast enough that I can have it always on, without a noticeable speed loss... So I do. If my ISP wants to sell my browsing habits, they can buy them from me.
Now that you mention it, I'll totally try torrenting something. Curious to know how it performs!