I've been playing a blind-master (from the Quint Monk) for some time now, and I absolutely LOVE him.
He's quick with his hands, and even quicker with his words. He's always ready to dispense his wisdom and philosophy upon anyone who will listen.
He worships Ilmater devoutly, and being blind, the whole suffering thing works out VERY well. He's Lawful good, and has been accused MANY times of being TOO GOOD. Paladins cower at the morals this man holds.
And despite it all, the hardships of blindness and his solitary life (although the blindsight and +50 to listen makes it extremely fun to play), he always has a smile on his face. I can honestly say I've never had more fun playing any character.
Monks in general are a GREAT class, with so much versatility it hurts. If u fancy a lot of fun and a bit of a challenge (being that for nearly 2 whole levels, a blind master is forced to play with NO sight and NO blindsight), then I highly suggest checking out the Blind Master PrC in the Quint Monk.
Other than that, try Beyond Monks for some VERY powerful PrC's (unbalanced to a certain degree in my opinion) or even the Drunken Master from Sword and Fist. I played a character for a bit with that PrC, and had a ball with him.