Though I've never used a gun myself or own one, I certainly would like to learn to shoot and buy one, One of the things I want to do before dying is go hunting :P
Unfortunately gun laws here in Portugal (and Europe in general) are way tougher than than most of the world, so both things would be kind of a pain in head to get.
As for my taste and knowledge in guns, I'm not really that much into it, maybe own a small reliable pistol and a hunting rifle. @Ebalosus
I read an article not long ago about 3d printed pistols, they already tested them and they work fine, although they seem to be made of plastic, even if made with high-performance plastics it makes you wonder if they deteriorate rapidly with use.