I miss read the question. I thought it was asking what the most interesting thing I've done, which apparently is one of the first things i did, a chess set that Voltrons into a robot: http://cymonsdesigns.blogspot.com/20...chess-set.html. I've been trying to live up to that since.

But the most interesting thing I've seen is the E-Nable project.

My prefect 3d printer would have the slicing software on the bot so I can send it the stl (over wireless?) and it just makes the thing, like printing a paper document. Like octoprint. It will also have servos instead of steppers so it can tell if the print head was moved and temp sensor to turn things off for safely. Of course the gadgets like a webcam and scanner would be nice but I'm less inclined to buy a crappy printer with gadgets than a solid printer. So get it right then gadget it up.