I think Robert Pattinson it's getting better at acting, searching for roles more demanding, and enjoying his twilight fame. In GoF you notice him, but since twilight you really said " Oh my god...", he is so handsome and easy going, he laughs a lot in his interviews...so cute, the fame hasn't stop him from being nice!...as for kristen, last night I saw interview and I think she doesn't like that her fame comes from twilight, and she looks unconfortable with her fans, she looks at them as crazy people!!