A great warrior, but certainly not "the chosen one".
I will say that after finally getting to read the Jedi Quest books, I feel that Anakin was just a big douchebag. Seriously, you go through the entire book run realizing that he is an arrogant Sith waiting to happen...and no one notices no matter how blatant it is.
I liked the idea of Anakin before he was explained in the PT. At least in book form it is shown just how far he goes from the open-hearted young slave boy and becomes truly disagreeable.
While I don't disagree with Anakin being Vader, the way it has been handled certainly removes all of Vader's menacing power. There is a huge difference between Vader now and the Vader of say for example Splinter of the Mind's Eye where he seemed like an unstoppable demon.