Are the characters in the book the same as you imagined them looking like as in the t.v. series?

I know a lot of people like me agree that most of the characters they cast for the t.v. series are pretty similar to how I would have imagined, except for two...I think Allison, and Hanna are a bit off from what I thought they would look like. Anyone agree?or are there other characters you think don't match up so well?