8/10, which is a really, really high score from me, if that needs clarification. Like you said, it COULD be improved, but not by terribly much. It's nice in how it matches with your sig's quote, so any user who only sees one post from you and never had any other interaction could quickly realize, "Ah, I can safely assume this user likes Dark Souls!" =D
I'm not AGAINST changing Avatars, if that was somehow not clear. I just hate constantly changing them over and over so you don't even realize who you're reading because you make the visual association before the read association, and that was happening these last few weeks. I'd go into a topic having SEEN "TorontRayne" as the last post, and yet once I'd get to it, my mind wouldn't make the connection, because a fresh new Avatar would be staring me in the face. It was jarring and inconvenient, and the more that happened, the more it grew irritating. I went through a period of changing my Avatar several times in quick succession, and the only reason I've stopped is because I gave up, essentially. I was trying to find the "perfect" Avatar, but I settled on this one, because it had a great angle, lighting, and coloring, it featured the character's iconic grin that he's known for, however I wanted a GIF. You'd THINK that a character in the world's most popular anime who's known for his laughter in the face of all odds and has a particularly iconic grin would have AMPLE looping laughter GIFs, wouldn't you? NOPE!!! Well maybe I'm just THAT shitty at looking stuff up (God knows, it's not unlikely... I AM bad at researching) but for weeks on end, none of my pursuits yielded anything to my liking. So to this Avatar I've since stayed.
Point being, if one changes their Avatars repeatedly because they're trying to "find their image", I've got nothing against that. But changing it repeatedly just for shits and giggles?
But back to the above Avatar... the only thing I'd personally think of that might be an improvement was an Artorias-themed image. But like you've said yourself, you went with Oscar because he's so iconic to the series itself, and he sets the events in motion, so anyone would easily be able to recognize him. It works. =)