Nasri has a high dislikability factor. I can't put my finger on it, but he's just a guy that is easy to dislike. I experienced this myself when watching a match a few seasons ago and he was really doing well, then he made two or three errors in a row and I was cussing him in my living room. My wife who was watching says "why are you going after him? He's been good all game until just now." I had to think about it and that is when it hit me. He just isn't very likeable. I felt much the same about Tevez. I think it has to do with their facial expression as much as anything. When they are happy and smiling, they are fine, their normal expression just looks off putting. If they were women, my wife would say they have resting bitch face.