[abbasmehdi]

Quirky vs. a-holish are two things. If your team cannot get over minor quirks, they are the ones with something stuck up them. If the guy is an a-hole, show him the door. If he is just loud and talks too much and it becomes a problem: make quiet zones and hours in the office.

Also, I am getting that you are judging based on an interview, so you pretty much know that you have no idea what kind of an employee he will be yet.