Playing with PCTG, and aside from the glossy finish and PET family tendency to get gooey, it seems to be a pretty solid polymer for this sort of stuff. Haven't shot this one yet, but have beat up on it on other parts and have been fairly impressed.
With reddit banning fosscad/diy related subs, folks are seeking alternatives. I'll try to keep a list of the more active ones in this thread, and of course we welcome content here as well.