I like the deranged, decadent feel to his figure and attitude. Seems appropriate for a character who's supposed to have been subjected to inhuman scientific experiments in his youth and is constantly pumping noxious chemicals directly to his own brain. Well done!
This is actually much better design than the one we got in TDKR. Also, kudos to you if my sense that this is partially inspired by his design in Season 4 of the Animated Series. If it isn't, still kudos, because this is awesome.