Liz Lemon (30 Rock) - Her social awkwardness and general introversion. Her frustration at people who make things difficult for themselves and refuse to get things done in an orderly manner. I can especially relate to the way she is generally withdrawn from everything on her show and seems to spend much of her time watching it all (only occasionally stepping in to save the show at the last minute, because my god are all of her co-workers incompetent idiots--she should have burned them alive in the meeting room when she had the chance...).
Susannah (Dark Tower, Stephen King) - Her tendency to visualize the potential of a place. Her sometimes "aggressive" method of trying to get someone to say what's on their mind or what they feel. As well as her tendency to accurately guess at someone's true feelings or easily see that something is amiss with them. Her ability to pinpoint the right piece of advice to give for that moment. Her direct nature.