I don't know what my favorite character in a video game is. Neeshka from NWN2 seemed like an interesting sort. Don't know how we'd travel in public. If you think the D&D universe has something against Tieflings, I suspect it doesn't hold a candle to the sort of reception we'd get in Texas.
Ashley from Mass Effect is just a normal sort of person in the military. We'd probably get along fine.
And then there's the off chance that Kane from C&C shows up. I'm pretty sure I'd let him in, listen to his scheme of the moment and then offer to help. Dude's basically Jesus with loose ethics.