Integrity and sincerity. Also, if I perceive that something is my duty or responsibility, I don't shy away from discharging it to the best of my ability, whether I like it or not, and I can and do sustain this indefinitely, and completely without resentment or ill-feeling. I'm patient and forgiving of people's failings, but I mostly manage to be that way without becoming a doormat, and where it happens accidentally, I rectify things as soon as it's brought to my attention. I don't procrastinate on matters of principle.
I also like that I'm pretty courageous. I'm not without fear, but I don't allow my fear to make a prisoner of me or anyone else. But I'm pretty sure I'm also a kind person, and that I "walk the walk" however difficult I know it's going to be. I'm determined, and motivated by things that no person can take away from me, which enables me to be constant and steady where my type is usually thought of as the opposite - I'm proud of that (which is something I like less about myself - my pride).
I find I value far more the good qualities I've had to struggle against my natural character in order to acquire, than the ones that sort of came with my personality package since childhood, as it were