Just wanting to gather some info for the printer I'm designing. What are your guys' favourite features to have on a printer (besides the ability to print)? This includes both when using and assembling/moding it.

Examples include auto leveling, auto calibration (for steps/mm etc), minimal wiring, lots of printable (moddable!) parts in the printer's design, fewer printed parts in the printer. Anything goes. Anything you feel is over rated?

I'm trying to include as many of the things I see mentioned/can think of without compromising too much on the low cost.