Shadowrun 4e. A hacker who was way into drag racing. I got really into statting his race car, and even made driving equal to hacking. He was in deep in the underworld, trying to buy his childhood friend out of her indentured servitude at a brothel.

Mad Max style wasteland campaign: A Shepard boy, skilled at archery, wandering the wasteland with a talking dog (who was named Blood, but wasn't evil). I saw this kid as being on the more idealistic and good side, and I picked a concept connected to society in contrast to what the other PCs picked (A reformed Mohawker, a powerful mutated woman wielding a stop sign, and a "priest of KISS" following the concert routes his roadie parents took before the bombs dropped, mistaking them for religious pilgrimage).... sorry that one had a lot of gas.

Superheroes: A jewish journalist who learns he is the inheritor of the Golem of Prague, and with it, a tradition of Talmudic magic. The other party members were a Bisexual paramedic/ vigilante by night (me and her player agreed that we were roommates lol) and the last one was a black teenager who killed a cop after he had paralyzed his brother. The campaign started and we were "the cop killers" and were protecting a small minority community but I keep thinking that had so much gas in the tank and room to grow and I might spin that off into its own campaign.

I'm just so sick of heroic high fantasy