I think someone once quipped on these forums (or maybe it was another one) that they liked to name Amarant Homo because then he'd introduce himself as "The Flaming Homo" -_-

As for me, I prefer to keep the names default in all my FFs, but I once renamed Garnet to Garnet instead of Dagger just for a quick laugh. I'm pretty sure I regretted it immediately and reset though. xD