Mello - Twins of Nihil COL

This uh... XD;; I dunno. I went the minimal route with colouring this one just because I was sure that it would take a million and one years to actually COLOUR it, and here it is finished so uh... is this cool? Should I do anything more with it? Anything DIFFERENT with it? Am I going kind of stupidly crazy with the textures and patterns? XD;;; Let me know if there's anything that I can fix about this!

Again, if you didn't see the lineart: this is my AU!Mello [left] and my friend Alex's OU!Mello [right] from the RP community of which I am a member. XD;; Their similarities and differences were fun to render, and the repetitive 'M' motif was intentional but I wondered if anyone would notice it if I didn't point it out?