Discworld's Samuel Vimes, because he's hilarious (then again so are all Terry Pratchett characters), and Nish in Ian Irvine's Three Worlds Cycle (Australian fantasy series released in the UK and America as well about a fantasy world and 4 different human species). The series actually consists of a quadrilogy, another quadrilogy 200 years later, a trilogy 10 years after that, and a trilogy yet to be released set after the first 4 books. Nish is brilliant because he starts out in book 5 (1st of the second quadrilogy) as an emotionally insecure boy who yearns for his parents love and recognition and the love of the main protagonist, and by the 10th book (2nd in the trilogy, numer 3 isn't out yet) he has risen above all this and not only stopped a war but become a man in the process, shaped a world and fought against his own corrupt father to destroy an evil empire and help the world through it's troubles. He starts out as a boy and yet by the end of the series so far he is one of the greatest characters in literature, someone to aspire to, and the change makes him so interesting and one of my favourite literature characters.