onepict, 
Personal opinion.
Despite RMS I think of the GPL and using those licences as a gift to the commons in perpetuity.
Unlike more permissive licences you aren't at risk of future releases being locked up in a kinda "Pray I don't alter the deal more" vibe.
There's nothing petty in how I use it.
But then I tend more towards the collective freedoms, than the freedom of anything goes.
I believe future generations should have access to all the code.
