Not bad!!! 
Congratulations on your first piece of Fanart and a bonus that you got this through a competition! 
And the only requirement about NSFW content is that it be at least 2 clicks away from the forums - thought they do appreciate DA's 'NSFW Content' self-censorship. Basically, we don't want to set up a situation where 'protected' members (or the 'easily offended') are finding that sort of content 'on' these forums.
Be Well!
Fireheart
Gratzzz on your receiving your very first piece of fan art, CG! And welcome to the Collector's Club!! 
~*~VexXxa~*~
The City Scoop Art Correspondent/Writer "ART IS IN THE EYE OF THE BEHOLDER"//"Don't hate because VexXxa is HOT and you're NOT." - JOHNNYKAT
awhile back i won a contest being run by an artist, and got a free commission. since he specialized in Anthro characters, i chose to have my Villain character Fenrir Lokison immortalized in art.
the result was very impressive.
the artist who did this art isn't on Deviantart, to my knowledge. i'd link to the artist's webpage, but some of his art is NSFW.
Fenrir Lokison is the demon-wolf of Norse myth, escaped from his place of imprisonment and now looking to regain his strength in time for the coming of Ragnarok, the death of the gods. opposing him in this is Tyr's Hand, the immortal agent of the gods, who must now find and recapture the demon-wolf before he regain his power.
i made Fenrir Lokison as a counter-point/sorta archnemisis for my main city of heroes character (Tyr's Hand). even without being able to have them fight in the game, i thought it would be fun to take the backstory i'd made about Fenrir escaping and the trail leading to paragon city, and make an actual villan character who could run around The Rogue Islands and the shared areas of Paragon City, and actually generate roleplay content for my main character to discuss in game.
Fenrir Lokison is a Stalker, with the Dark Melee/Regeneration power sets. he isn't anywhere near the level of my main character yet, Villains take a bit longer to level up, and Tyr's hand was already 20+ when i made Fenrir, so he has lagged behind a bit. not that such things would matter in roleplay though.