Most favorite; Warring Kingdoms Jarvan (FOR THE KING) Fox Fire Ahri (hottest splash art in the game, nice particles) Dragon Tamer Lulu (that little dragon rolls on the ground laughing when you /laugh, which is amazing)
Least favorite; Steel Legion Lux (awful model, horrendous sounds. ugly splash art. particles are cool but nothing else about the skin is. i refuse to buy this, but I would buy those particles on her default skin for 975 RP.) Full Metal Jayce (mutilates his beautiful voice, looks blocky and boring) Mecha Kha'Zix (stupid warning lights draw more focus, missles look ugly compared to glorious void spikes)
Mecha Kha'Zix would be so much better if it didn't give your opponent the huge YOU ARE ISOLATED, GET TO YOUR MINIONS warning sign. With classic Kha'Zix it's hard to see whenever you are isolated because he only gets a weird circle around him. I do like the sounds of Mecha Kha'Zix though.