Even though I'm glad to vote for him as he's my favourite actor, it kind of annoys me that Tom Hardy was listed as a breakout star for Inception, seeing as he's done some earlier films which first got my attention drawn to him. Also, I thought that Cobb and Mal were actually a good couple despite:
a) having little screentime together.
b) rarely being romantic
(Cobb shooting Mal, Mal stabbing Cobb, Mall committing suicide etc).