Really enjoyed looking through this whole thread, and your J Jonah is terrific! Very animated! If pressed to give one criticism, I would suggest taking some of the purple out of his eyes and de-saturating them a bit. 
Edit: By the way, just wanted to give special mention to your shark man: I know it’s an old piece at this point, but I just laid eyes on it recently for the first time, and wanted to say that I love it! I usually find that sort of design kind of silly and childlike, like some Masters of the Universe toy or something, but you made it so much cooler than that. I love the skin! And you somehow managed to hybridize a shark and a man without it looking overly cartoonish!
Very impressive, and I love his gear, too. Good costume design is storytelling, and there’s definitely a story behind what this character is wearing!