Everyone knows that Michelangelo is "A Party Dude" and most times that means he's the fun guy. But y'know what else that means? What do we do at parties?
We gather. We socialize. We meet other people.
And that's always been Mike's thing throughout the various canons, hasn't it? He's always been the guy most interested in trying to reach out to people.
-Like the 1987 episode "The Gang's All Here", where he takes a spiked cookie that turns him into human so he can go out in public.
-Or in the Next Mutation episode "Turtles Night Out" where he hosts an animal-themed costumed rave. He also hosts a radio talk show which gives him the chance to interact with people.
-In the 2003 canon, his desire to be a superhero is so he and his Turtles can be accepted by the masses.
Of course, sometimes it backfires, like in the 2012 canon episode "New Friend, Old Enemy" where his attempts to befriend famed martial artist Chris Bradford goes wrong because Bradford is in with the Shredder.
And yes, in Mutant Mayhem all of the Turtles are keen on being accepted by humanity, but the one most common to do so is our 'chucker extraordinaire, Michelangelo.