Well, when it comes to comedy you're talking to the wrong person. I do not like comedy very much because I am a really, really serious natured person, and comedy doesn't always do it for me. Sometimes, but I have to be in a really, really special mood or with a certain few people.
I thought in Sonic Adventure 1 and 2 Eggman was badass and totally dangerous. Sonic Heroes and up, not only were the games horrible, but Eggman... Omg, ridiculous. I hated every game after SA2, which was the last good Sonic game in my opinion.
I hated Decoe and Bocoe. Did you see that part in Sonic X where Eggman said, "I don't like the way you attacked Chris and Cosmo. It's one thing to threaten people but when you actually hurt somebody you've got too far."
And then the robots are like, "You said it doctor" "Yeah, at least we have morals!"
Your Robotnik was awesome because he was a mix of funny, but he had the right amount of danger. Like, he wouldn't make a big joke out of it if he caught Sonic. My favorite quote from him was when he said, "That hedgehog'll be future fossil fuel!" I adored that quote.