What personality types do you tend to lock horns with the most? From what I have seen within myself I lock horns with the following; From what I have observed in New Zealand these are the two most common personalities. Men - ISTP/ISTJ, Women - ESFJ/ESTJ. ISTP - I tend to argue allot with these guys. I find ISTP's too rigid in thought. So its hard to discuss theories with them. Everything has to be fact with these guys. My boss is an ISTP. My younger brother is a ISTP and he drives me up the wall with his "drumming facts" and "car facts" I find them very insensitive and when It comes to cleaning... don't even bother. ESTJ - Loud and bossy. I work along side with these guys on a regular basis. They don't understand the concept of being quiet. I find them very disruptive and impolite. Terrible when trying to serve customers. I get told I'm stupid or lazy all the time from these guys.