I was one of those who was all for Rob right at the start. My first love was Harry Potter, and I adored him as Cedric. I think it was only natural, with Stephenie's description of Edward in the book, that it was Rob's face I saw immediately. So he literally has been my Edward from the very beginning.
In my head, Edward literally looked (and still looks) exactly like Rob does.
Also, I am the same with Stormy ...
I can't help from imagining the characters from the movie when I read the Twilight books now. I used to have my own versions of them, but now the characters are set and I like them all!
that happens with me whenever a book i've read gets turned into a movie that i see — whether or not the actors and actresses cast go along with my vision of the characters. I suppose I was lucky with Twilight that the actors and actresses they chose matched very closely with how my mental images!