In Fallout 3, shortly after the death of Billy Maze, I created him as the vault dweller. I focused on charisma and perception using explosives (KABOOM) and hording Abraxo cleaner. I also had a wicked addiction to Jet.
In Skyrim I made WWE wrestler HHH using two handed hammers and unarmed. Dumped some into speech since he can deliver a pretty damn good promo.
Duke needs to be a joke to be taken seriously again. By that I mean he needs to retain his attitude and arrogance, while the rest of his world/universe laughs at him. He should be the only guy in the room that doesn't get the joke made at his expense. There shouldn't be kids asking for his autographs or chicks giving him hummers. He should not be idolized in his world, he should think he should be idolized while being mocked.