Pretty much all books, history, science, civil rights, anime, travel, or, you know, baby animals.
The Rake (revised from The Rake and the Reformer) has two of the best characters I've read: Reggie, who is fighting to recover from alcoholism, and Lady Alys, whose actions show that empathy is a strength. Their internal growth is powerful, and believable, and painful, and wonderful. It has solid history, strong secondary characters who get their own time in the sun, kids, dogs, cats, and horses.