Unlike some commercial forums, the Carrara forums don't seem too bad.  DAZ let people say plenty of mean things about them, yet still seem enthusiastic and patient when trying to help.  The users are great, most people seem to have an idea what they are talking about and the range of talent is great enough that you don't constantly feel inadequate looking at other people's work, yet see enough quality work to inspire using the program and respecting its community. 

I'm happy to see as much discussion here as there is, so I will have to remember to come back.