well im going to give you a serious critique ok? because i honestly see potential in your work.
there is a lot of detail and the first thing i see is the face when i look at it, its very nicely shaped and menecing, the wings are very nice and detailed too, though im not sure if you wanted them to be that small or just because of trhe size of the paper or your style of him, just anatomy wize it wouldnt lift him, usually i see griffons with like HUGE wings XD
i do really like how you made it dynamic and how his left arm is closer, the overall design of him i like, maybe soemthing you need to work on more is making it neat andproprotion it better, to make the nails look better make it look like its going inside the toes if you know what im saying, l;ike a indent,
Danbuster: *standing amongst a crowd of inhabitants from his town - including, of course, Frederick, Spencer, Einspine, Schäferhund, the RocBeaks and Rudderbucks - and also including Rippovski, Revd Goodsoil, the police force and other random anthros. He stands like a cowboy, making a bad John Wayne impression* We dohn't tek karndly to threats in THIS town, buddy!
Raven: *Chuckles quietly to himself* Is that fear I sense? The only reason is because you needed to impersonate a fictional character portrayed by a popular actor, in reality I dont just sense it, I can SMELL your fear!
Danbuster: *sniffs* Spencer? Have you been eating stilton again? You're ruining the effect! Spencer: Sorry, mate! Frederick: Heh, fear? Whatever... we can get over it. You are UGLY and there's no cure for THAT!
Nothing personal, really. He's not really badly written. But to take an example, Raven has similar personality traits to Snowball from "Pinky & the Brain" - and I don't like Snowball a lot of the time. It's just that they're that sort of backstabbing bad guy that I don't want to get too close to.