yeah, u need to be yourself. but at the same time, u need to know what to expect. you can't just be yourself without knowing what you're talking about.
so going over some typical questions, like why pharm, what do u see yourself in 10 yrs, would be nice. like spyris' friend, my friend also "studied" the questions and thought he was gonna get in, but he didn't get into any school. does that mean you shouldn't prepare for interview? NO! it means that you should know what you wanna say, but not to the extent that you're memorizing things that you wanna say.
yes, in the end, know your stuff and be yourself. then you're golden!
hope it helps.