What do you mostly use 3D Printing For?

[printbus]

I'm an at-home user, doing it as a hobby. I find it offers a fascinating and fairly unique combination of mechanics, electronics, microcontrollers, software/firmware, and materials science. There's almost always a backlog of things on the "hey, could you print something to do this" wish list. Time permitting, there's also always something I can futz with as far as a setting adjustment or upgrade on the printer.