I build using every type of material
I've never really understood the vehement opposition to certain materials that some people seem to have. There'll be someone looking to branch out a little, maybe try a nice balsa sport plane or a foam 3D trainer, and inevitably there's some yahoo who absolutely condemns whichever material they're looking at.
"Foamies aren't REAL models!"
"Balsa smashes into little bits and you can never fix it!"
"Carbon blocks radio signals!"
"Fiberglass is... " Ya know, on second thought I don't think I've ever heard major criticism against glass
You get the idea, though.