Why I am pro-GPL
I work in industry.  Anything GPL is a non-starter.  I totally understand and appreciate the concerns, but at BigCorp GPL doesn't play.edit: I'm well aware that some people don't want industry using their code.  Great!  But that's really limiting the scope of who's going to get involved, and it's probably going to make it harder to get a sufficient community involved to help your project achieve liftoff.