i know the feel. between all of the skins this is my synopsis of quality.
classic: PLZ UPDATE MY FUCKING MODEL
Bloodmoon: the try hard skin, look really cool. Probably the best one
Artic: autos bother the piss out of me, his face actually looks presentable, solid skin.
M.D.: the cutest one, THAT FUCKING TINY HAT THO, makes kennen the smollest and thus the most cute, Q looks cool really nice autos as well.
karate: aight, nothing terrible but not that amazing, i don't like the splash tho.
Swamp master: the only reason to own this skin is for the simple reason of being able to say "i own all the kennen skins." easily one of the worst skins in the game, second only to garbage trundle.
Deadly: you're a deadpool fanboy or you just like the color scheme. pretty cool autos, face is fucked up tho.
personally i rate them Bloodmoon, Artic, M.D. Deadly, karate, classic, swamp.