Bryan Cranston about Hamm

                                       http://aboutactorjonhamm.blogspot.fr/

On how his unremarkable appearance is an acting asset
I have a very fortunate look for an actor. You can't really categorize me. My looks aren't striking, so therefore I'm more capable of sliding into looking like other people, more chameleon-like, as opposed to, let's say, Jon Hamm, who is this handsome, striking, black-haired, chiseled-looking guy. That's great for Jon, and he's a friend and I love him, but I don't know that you would buy him as Walter White. He would have to fight against his looks in order to do that. So there's a larger range of roles that are available to me than are available to Jon Hamm, simply because of physicality. And I love that.
http://www.npr.org/2014/03/27/295246908/from-walter-white-to-lbj-bryan-Cranston