The
problem with Sonic is that all of his newest games are trying to be
more serious than they really should be.
His older games are still fun, and Sonics 2 and 3(&K) are like some of my favorite video games ever. Sonic Adventure 1 & 2 were both fun, but they marked the beginning of the downward spiral into throwaway characters and furry little critters riding motorcycles and swearing.
Speaking of Robotnik, he should be Robotnik again; I'd be much more frightened of a fight against the maniacal DOCTOR IVO ROBOTNIK than some twit called Eggman. I can see Eggman being a nickname for him courtesy of Sonic & Co., but how can the Doctor expect to be feared with a name like that? It sounds like a really bad name for a superhero.
That's his name in Japanese. I honestly don't know why the changed it back, though. "Eggman" only made sense when he was, you know, making "egg" stuff. Like the Death Egg in Sonic 2, or the Egg Carrier in Sonic Adventure. It's funny that once they officially renamed him, in Sonic Adventure 2, he was too busy getting his screen time jacked by Shadow to make any new "egg" stuff.
I found a pretty neat article about the poor hedgehog on DA. It's a few years old,
but it's still pretty dead-on.