I remember hearing Vader say "We will test it on Captain Solo" in ESB and thinking that it made Han sound really really cool. Even Vader had to give the most badass smuggler in the galaxy a title. I'm also a Han fanatic and adore the Daley novels, so it seemed apt.
Yes, I do have the Han standee. Don't judge me. ;)
Plus "Damn Fool Idealistic Crusader" seemed like it was too long of a screen name.