I find it depends on how much of a hardass one's DM wants to be about the definitions- there is a clause in there that says personal codes count, as long as they're held as ironclad. I have a Lawful Neutral dwarf monk and ours is letting me play her as Shaolin priest and not Judge Dredd. (She had to be Lawful something to be a monk, I don't play evil, and I get really tired of of the whole take-the-paladin-over-the-hill-while-we-loot-the-bodies schtick :)