When $EDITOR is vim, but I expected anything else:
opens file, with small text on the top; text begins changing; text duplicates in size, then triples; text returns to original size; text increases in size to fit several screens…
Then my great reflexes kick on and I notice something wrong :)
word processor users when they try vim (me):

First few time I opened vim (will neovim) I failed to see how to enter a command, and closed the window to get out of it
When $EDITOR is vim, but I expected anything else:
opens file, with small text on the top; text begins changing; text duplicates in size, then triples; text returns to original size; text increases in size to fit several screens…
Then my great reflexes kick on and I notice something wrong :)
Do you prefer when EDITOR is set to emacs?
I ideally with evil installed and easily toggleabkw with M-x evil-mode<enter>
for accessibikity purposes
Personally, yes. But the default being nano is very sensible.
The default should be mcedit. Much more usable than nano