A few years back I tried doing a Sonic graphic novel based on a movie concept I had in mind, but I could never finish a fan comic. Comics require so much time and energy it's hard to justify doing one based on someone else's property. Did get some good pages out of it though.
Robotnik was fun to write and draw. Bit of an eccentric and callous industrialist.
I wrote Princess Sally as an eco-terrorist, the opposite of Robotnik.
Sonic and Tails were written as outcasts who got into trouble all the time, and only destroyed Robotnik's machines out of boredom for the most part. Later I'd reveal there was a bit more to it than that, and Sonic mostly just didn't see the point in getting rid of Robotnik 'cos another just like him would take his place, and he also ends up disapproving of Sally using people to further her own agenda.
But it was Bunny who stole the show.
Oddly enough, the best-looking page in the comic was drawn while I was drunk.