again, I can't really comment on how Sonic-like he is, aside from the fact that you can recognise him... and I agree with the-error404, personalising other people's characters helps bring out a more unique perspective.
There's no point in drawing sonic exactly as the original character. It wouldn't be funny. Funny is to make it like YOU see him, mate. And i personaly like it, it's perfectly understandable and pretty neat if i must say so.