Words can barely describe how happy this makes me.
Being a great fan of Batman and especially the Joker, I've seen much fanart of him on dA. Some cartoony and funny stuff here .. some more serious and mature stuff there .. but you, good sir, created a slightly different version of him, in my opinion.
I like his gruesome, grotesque and beastly appearance. I was getting a little bit sick of all the "oh so handsome and sexy Joker" pictures, but hey .. his smiling also appears quite .. charming. Anyway! I should end here. xD Really good job and stay awesome!