Hisoka modern pose colored

Hey,

It's an old sketch (fanart) of hisoka from the mangas hunter x hunter ,and i used the mouse to color it  
With his hair down , i found hisoka very cool


Any suggestions on how to liven up the character are welcome. Also, any advice on anatomy is welcome. Red-lines are appreciated.

i would like it to be especialy about my skills in coloring as i'm not happy with it at all D: (and of course other mistakes if you find themXD).