I'm fairly much direct; I'm not a great faker. But it really throws me when people are overly 'social' (or just more socially skilled?).
I had an entire conversation recently where the other person was obviously thrown by my complaint, and unhappy at being challenged during our talk, but rounded it up by saying 'it's been a pleasure' very huskily and sincerely. I snorted. I'm wondering if I'm aspergers now.