Interviewers loved to talk about their research. If you can get them off on a tangent about their research, they’ll take over and enjoy the interview quite a bit. Of course, you won’t get much opportunity to talk, but then again, you’ll make a favorable impression. Lots of interviewers ask about hobbies and surprisingly, many of them will share similar hobbies and interests with you. Almost all programs will ask where else have you been and what do you think about them. Tell them the truth, but only if it’s favorable. Don’t badmouth other programs or dish out dirt. Obviously avoid politics, religion, etc in the topic of conversatioun.