Luci #1 is my #1, the prehensile hair does it for me, along with the presumably prehensile penises. Also I like the hooved feet with animalistic leg bends(lol I don't know terminology) only part I dislike is the fish fins... seems a bit fishy.
I like all the others but damn does Luci #2 have long fingernails.(nice tail though, quite thicc). Although looking at CosmicHound's comment, I am really starting to like Luci #2 more... the no eyes and yes big mouth is really unique... I bet he has a long tongue.