I thought Sean Bean was horrible in Oblivion. Sure, he squeezed it out when Martin had to give a speech, or had to be frightened of a book, but for the money I'm sure Bethesda had to spend, the role could've been done better for less money with a less prestigeous actor.
Don't even get me started on that turd of a job Patrick Stewart phoned-in and got an award for. When I think about the sacrifices that other, less important departments at Bethesda had to make, departments such as programing, art, story, and game play, it's hard not to wonder how much better Oblivion might've been if they hadn't felt compelled to pay Hollywood actors Hollywood prices for sub-par, tired performances.