After reading about Harriet Miers and her history over the last two weeks, this is my take on her:
She is no intellectual heavy weight. That is for sure. But she is no Gomer Pile either. She is smart, articulate, and ambitious. I don't think is an ideologue of any stripe. But at the same time, I don't think she is independently minded.
Harriet Miers, while being president of this and that over the course of her career, she is easily swayed by the ideas of others and likes to impress people with flattery and loyalty.
I think that if she ends up being liberal, conservative or another swing voter purely will be dependant on who she is most impressed by on the bench. If she adopts Scalia as her mentor, she will be a staunch conservative. If she falls for Souter or Breyer she will be more liberal (I think we can rule out Ginsbrug as a mentor).
It is too bad that Miers would be replacing O'Connor and that they would have no time on the bench together. I think Miers would have taken O'Connor as her role model if they had served together.
I think the whole idea of trying to find out who she is is rather pointless because I think who she will be will be determined much by who she is surrounded by.