v3 is a lot longer than v2 and has a lot more stuff regarding patents, tivoization etc. I'm no expert, I just looked at StackOverflow: http://stackoverflow.com/questions/41460...3-licenses. The most important points are the same from v2 to v3, as far as I can work out.

This is why we should have used the 2 clause BSD license, there are only 2 bullet points to read, it's so easy to understand! I still think it's unlikely anyone will try to steal our code and if they do, I doubt gpl-violations@gnu.org will care, since it's a small project.

The people have spoken, though. My vote is with GPLv3, since all that work Stallman and friends put into closing all the loopholes must have made the license better.