I think the interviews at UCI were very fair. My student interview, too, was pretty long. I didn't get grilled about Euthanasia, but I did get some trickey healthcare questions and other questions. The faculty interview was pretty conversational. My faculty asked me what one thing I wish I could change about myself? That was a pretty tough question, but I answered it truthfully. Besides that, nothing else out of the ordinary. BTW....my faculty interview was in Orange, at the med center. Don't worry about driving, UCI DOES shuttle you there. The people in the admissions office do a kick ass job or running the day. It is well organized and made to be low-stress!
Good Luck