Although Anne Boleyn is not be the most well-liked or admired of Henry's wives, to me she is probably the most interesting and certainly one of the most intelligent of the six.
In a way, I feel that Anne was just as much a victim as Catherine of Aragon was, even before she was executed. After all, initially she had no intention of going after Catherine's husband, she wanted very badly to marry Henry Percy and just live her life. Henry changed all that, and she was almost forced - indirectly - into the situation she ended up in. I think that she tried to make things as difficult for Henry as possible (at least initially), hoping that he would leave her alone. But he didn't. So finally she may have decided to make the best of her situation... Very often Anne is vilified, and Catherine of Aragon is sanctified, but I think there is a lot more to what happened than meets the eye.
Recently I visited Hever Castle, where Anne grew up, and it was very interesting to see her room and generally what her life was like when she was young, including some of her embroidery, etc. I was hoping to have a thread here dedicated specifically to discussing Anne Boleyn.
P.S. I want to add that I am also really excited about the Tudors thread - as I love to talk about them!