Initially met with a Plante Moran representative at a recruiter's reception on campus. From there I was selected for an on-campus interview which consisted of a 1-on-1 interview with an associate. This interview was fairly casual, basic behavioral questions. The interviewer was easy to speak with and seemed genuinely interested in meeting with me. He gave me information about himself, and his experience with the company before we even got into the actual interview. I was then selected for an office visit with several others, though I met 1-on-1 with two partners and an associate staff member. After a lunch with some partners and all the "buddies" I received an offer that evening via phone call.
I believe the initial impression made at the recruiter's reception was the first big step, but the on-campus interview was the most important to prepare for. Plante Moran, as it has been explained to me is a very friendly environment. They don't like stiff, overly formal or pushy people. An easy smile, laughter and solid intellect would be the way to go.
During the entire interview phase I never met one grumpy employee, nor one who gave me any impression of disdain. The entire company culture is very kind, flexible and rewarding.