Epic, Chardes. I'd tell you to try that type of art with other Navis, but not sure if it'd work for others. Eternalis, for instance, would look rather silly.
Chardes, I'm not going to lie. That picture f*cking scared me. The sword and the darkness to the left that doesn't show in your avatar just makes it that much freakier better.
...freaking awesome. :'D
(also, wtf at the guy on the left in Fera's post.)