Each of them are pretty in their own way.
Bella is pretty in a natural, down to earth kind of way.
Alice is because she is so gosh darn sweet and perky which reflects on the outside as well.
Rosalie has a beauty that reminds of the movie stars back in the day.
Victoria has a wildness to her that makes her attractive.
Esme has a sweet, classic beauty.
So, I really don't have a favorite lol :)
in real life I think Kristen, but in real life Alice