I'd like to say "any assassin or thief-type character"... but truth be told, I'm not. Oh sure, I love darkness, dark clothing (particularly cowl-hooded cloaks) and I can sneak quieter than our cats can... but personality-wise, I'm not like that. I don't think I could kill by choice and I'm certainly no thief.
I'd say I'm probably like Imoen from Baldur's Gate 1+2. Agile and capable, intelligent and stealthy, but with a strong moral compass and a dislike for seeing "wrong" happening (for lack of a better way to put it). What I mean by that is I abhor slavery and its like. Anything that would restrict the rights or life of an innocent, by which I mean someone who has no involvement with the situation and is generally a good person, I stand against. Not to say I don't like a good fight though. I also tend to be a little self-doubting and some would say I refuse to see my true worth. Modesty can be a pain in such a respect.