the beginning of a masterpiece

As the title says, this picture is the beginning of a masterpiece. On gaiaonline, I am going to create a rollplay character... who is Satan himself. He is the embodiment of every one of the seven deadly sins: envy, greed, sloth, wrath, gluttony, lust and pride. This... will be a challenge to pull off, but I believe that in the end, it shall be worth it. Oh, and he feeds on the darkness in the hearts of humans, so he pretty much can't die, because as long as people have free will, there will always be darkness. He can be hurt, however, but that is something which I will not disclose here.
Comments are much appreciated, and any ideas as to how I can improve my masterpiece are also very nice ^^

ps. Firstly, thanks to the people who have already commented! Secondly, keep in mind that this idea will most likely be changed around... a LOT before I actually start rping him. He will continue to be completely evil, with not a single spec of good in him, as I've never done a character like that before and would enjoy it greatly, and his outward appearence will remain, but things will be altered as far as his story line and such.