Lawful Good, like a Paladin or something in your generic fantasy world, as it offers nice RP possibilities. The step from, with warcraft terms, Argent Dawn to Scarlet Crusade is not that far after all and a fall from grace is always interesting.

And chaotic neutral is interesting, a violent Corvo in Dishonored is a decent example for that I think and it was a very enjoyable playthrough too, to see how much trouble I could handle at any one time.