The one nano user I know is probably not going to like this comic
Vim. Usable in just about every environment. Does one thing, well. (picture of a fixed-blade knife).
Emacs. Flexible, customizable, and packed with just about every feature known to man. (picture of a Leatherman multitool).
Nano. Mostly used by people who don't know what they're doing, or psychopaths.
Atom. (butter knife)