I use heirloom vi (while making it clear when asked that I doubt the person asking me should do the same ;)

I was basically forced into learning vi to begin with (editing things on a -very- heterogenous collection of servers) but then found after a few weeks that I found it surprisingly pleasant and stuck with it.

Then again I don't recall sending a vi instance anything involving the control key except for Ctrl-C, Ctrl-L and Ctrl-Z.