I spend too much time thinking about this, to the extent it's probably unhealthy.
In D&D 3.PF terms, I am a "human" Gestalt Druid|Witch using the Rogue Genius Guide to the Talented (Druid/Witch) rules-- I am basically a cross between a Synergist Witch and a Visitor Druid, but I'm taking a hit to Druid spellcasting early to start with animal companion, enhanced senses, and alien form. We're pretending I am Chaotic Neutral for legal purposes.
So I'm a little bit psionic and can manifest a very basic mind blade, I can cast 1st level Witch spells spontaneously (I lean on charm person and cure light wounds), and I've got a deinonychus animal companion and a compsognathus familiar, and I have a couple of significant tricks to pick leftover from either class.
At this level, I'm mostly just healing people where I can-- cure wounds is less useful in real life than you'd imagine-- and gaining levels by picking people that deserve to be happened to, and happening to them. By the time I can start pushing this verse past its tippy point, it'll be interesting to see who's cheering me on.
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Less confusing and less horrifying, Eldritch Scion (Draconic) Magus | Archeologist Bard. Lots of 3.5 Draconic feats. Since I can't ride the Suicide Express, I'll go Elan... and since I'm already psionic, hey, mind blade feats.
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Marvel?
First things first, I am a supervillain. Doesn't matter that I'm trying to make the world a better place for most people, if you look at whom I'm attacking and who rushes to their defense, I'm the guy who loses in the end but gets all the fangirls anyway. Even when I'm not actually hurting anyone... somehow, I'm going to be on the wrong side of the law and all of the renegade, fugitive, illegal vigilantes upholding it.
I am your classic Malign Hypercognition Disorder supergenius supervillain-- I'm not sure I'm enjoying this game anymore-- who has finally realized that I'm not better equipped to properly rule the world than the people I know are doing it wrong... so my goal is to create a world that the unworthy will find ungovernable. I've got an unhealthy interest in eugenics, but I'm actively opposed to... both the real-world reasons it was a villainous pursuit, and the comic book reasons why it's a villainous pursuit.
So... my starting powerset is just a d10 superintelligence, but I've developed techniques for microcloning and viral genetic modification for the duplication of mutant/mutate abilities. Which I would use irresponsibly, for a price, to fund my ability to use it irresponsibly and indiscriminately.
Who does that make me the enemy of? Spider-Man, of course. The X-Men and the Brotherhood. The Weapon X Program. Coincidentally... which superhumans have the most of their biological tissues and genetic coding available on the black market? This... also... puts me on the radar of the Jackal and Mister Sinister.
I'm basically a Weapon X knockoff Spider-Man with sub-omega psionics and a smattering of ridiculous minor powers, like hyperlinguistics.
My name is Doctor Apotheosis, and I run a sketchy off-the-books "adoption" agency.