His skin shows the effects of the esteroids he uses, giving him a strange tone... this last detail comes from the design from The Batman, where you can see Bane mutate in a very original way. Nevertheless, my favourite Bane is the one from the Gotham Knights series.
EDIT: (after looking Bane up in Wikipedia) Well, wadayaknow, it seems Bane is a more whise fella than you could imagine by looking at his latest incarnations. My bad, lack of documentation. Although he seems to be famous for braking Batman's back XD
Let's see....last I recall....BAne was a Luchadore, but the chemicals as to why he used them I forget =/
Bane became a replacement heir to Ra's Al Ghul's empire after Batman turned him down, before falling out with him and deciding to get him back by destroying all of the Lazarus pits. That's definitely something of note, considering Ra's recognized Bane's intellect as being equal to the greatest he's ever seen.
Successfully beating his addiction to venom and becoming more dangerous for it, Bane might not have superhuman strength anymore, but he's still a waaay stronger and skilled fighter than most, and is now more focused and not at risk of going into sudden crippling withdrawal (which is how he was eventually beaten the first time). He also slaughtered almost all of Two-Face's gang single-handedly during No Man's Land, beat up Joker, and then gained control of his home country of Santa Prisca for a short while.
He's been through so much during his years of character development, and I don't understand how you can say he's a one trick pony, unless you just haven't read the stories he's been in.
So far as Bane is concerned, though - yeah, I never read any stories with him in it, you caught me red-handed. But by the same time, Bane fails to stick out because all people remember him for is "BREAKING THE BATMAN," which I suppose makes him more of a one-hit wonder than a one-trick pony. He doesn't have the tenure of other Bat-villains, and he's not as interesting as, say, Harley Quinn, who precedes Bane by a couple years-ish.
Think about it: With his looks being like that, one would be totally flabbergasted if he suddenly told you about the plan he hade conjured up for poor Batsy.
Anyhoo, excellent work! Really diggin' his proportions. That odd-shape of his head really fits well. ^_^