So far I have been invited to one interview for a program taking place in couple weeks. I am beginning to prepare for it and have been glancing at the preparatory list of questions that I might be asked as well as scrutinizing the program information. In terms of preparation, I have heard two sides of the coin. People on one side have been telling me that I should be ready to comprehend any and all information about my POI and potential interviewers especially about their publications. They recommended me that I should definitely read into their major research achievements and try to build that into the interview process to sort of "impress" them. Other people have been telling me that this type of preparation may backfire and come off across as a little arrogant and know it all. Their advice was just to be who you are and show your humane colors. I plan to read at least some of the defining publications of my POIs but how much is too much of preparation? In general, should I just go with the flow having already immersed in some background knowledge about my research interest and fit with the POI? Or should I even bother doing a more extensive digging and learning at this point?