I'd put "saintly" except for the fact that if the circumstances are right, I won't hesitate to pull a
Victor Cachat maneuver (i.e. back-stab my entire government if I feel it's becoming too evil or corrupt, wipe out my entire unit if they order me to kill civillians, etc) if I'm sure that it will be for the greater good... (I can be quite ruthless, if needed, but again, only if its for the greater good, not my own personal ambition or vengeance).
One example is in Arcanum, my half-elf technologist chick (yeah, she was REAL popular with her father's people, let me tell you.

) and I decided to join the Sherrif "Doc" in gunning down the Bandit gang (which had the nice side effect of boosting my good rating and reputation), then dynamiting the thugs blocking the way out of town when I finally decided to leave, because the parasites deserved it.
EDIT: That and the fact that I'm not bashful about taking reward money (but not if it's all that the people have) or goods/services in exchange for dispatching the villians... Yes, I'm a hero, but I have bills (ammunition, weapon and equipment upgrades and/or repair, etc) to take care of too, and if I neglect that little practicality, then I won't be able to smite the badguys for very long.
One of the best examples of how I play such games would be the Anime character
Bolt Crank... I.e. a cynical SOB with a heart of Gold (probably explains why Cid Highwind of Final Fantasy VII is my favorite RPG character of all time).