Definitely Blender. I'd consider myself a medium grade expert at using it for CAD, solid modelling, 3D printing, yet there are vast sections of it I have never touched, and appear to be so rich that you could build a career around them without overlapping with my skill set.

Thank you. Can you explain to me the meaning of the "type" field in the Profile area? Is that some default for what posts are visible maybe? Seems a bit redundant with the similar interface in each community. :)