Jonny Lee Miller's horrible accent
The guy just CANNOT do American accents so why does he keep getting cast in these roles? He was laughable in Mindhunters (although somewhat fitting given the low quality of the movie).
Trainspotting aside, he's also a fairly terrible actor, particularly when he's cast as a bad guy (Dexter). I mean, I don't want to rail on a person, but he doesn't convince in TV or movies.