Um, no... actually I find her very attractive, and I think that she is a great actress. That's not it. Some of her appearances in Burton's films have worked (Sweeney Todd, Big Fish) but some were terrible (Planet of the Apes) and others just felt like he needed to throw her in somewhere (Charlie and the Chocolate Factory) or else he wouldn't be getting any action for a while. Depp and Burton are the same way... I like them both, but its starting to feel like Burton just NEEDS to throw Depp into every film he can, even when it's not necessary. And if the "Alice and Mad Hatter love story" rumors are true, it sounds like (once again) Depp's part has been written to be much bigger than it should be just because audiences love him.
Also, for the record, I think Sam Worthington f**king sucks as an actor and I've never suggested him for anything.