This question suggests your interviewer is looking for you to provide something negative, but don’t fall into that trap. Keep your comments as positive as possible. Let your interviewer know that you have a lot of patience and tolerance for others, that you thrive working with a diverse array of personalities, and you recognize that there will occasionally be some “characters” to contend with. But if you must get more specific, mention that you can get annoyed by excessively rude people, liars, and those who refuse to cooperate or follow instructions. Keep your answer generic and unrelated to specific bosses or coworkers, etc. Try to keep a positive spin on your comments, rather than reveal any true frustration with particular personality types.