Without a doubt, Neal Stephenson's Snow Crash.
[blockquote]Until a man is twenty-five, he still thinks, every so often, that under the right circumstances he could be the baddest ************ in the world. If I moved to a martial-arts monastery in China and studied real hard for ten years. If my family was wiped out by Colombian drug dealers and I swore myself to revenge. If I got a fatal disease, had one year to live, devoted it to wiping out street crime. If I just dropped out and devoted my life to being bad.
Hiro used to feel that way, too, but then he ran into Raven.[/blockquote]
The hero-protagonist (whose name is Hiro Protagonist) is a badass samurai coder pizza deliverer in a dystopian future.