It is!
Basically, what seems to be the problem is your obsession with AAing everything, and you've left quite a few single pixel gaps. Your pixel clusters aren't great.
Here's an edit I made of your piece: http://i.imgur.com/iGUiW.png
Once you control your pixel clusters, you don't need any AA/buffering in most cases!
Banding is a terrible disease that I can't seem to shake! XP
And Manuziari, yeah kinda. This is an edited version of what I posted so I could use it as an avatar. Description~
Watch out for banding, there's quite a lot of it here!
I'd also post this without a white background, because it's really bright for now, and sucks my attention away from your portrait.
My go using your edit for reference.
http://s4.postimage.org/2elcavh44/Sexyfine_2.png?noCache=1313392074
Also added reference to the description for better critique