I have only interviewed at Haverford and Mount Holyoke Colleges. I expect to have alumni interviews for Carleton and Bryn Mawr later, as well.
My first interview was at Haverford--I wish I'd been able to use Mt. Holyoke as a "practice," since I'm far more interested in Haverford than MHC, but oh well. I wasn't nervous. My interviewer was as current senior, and not particularly responsive--lots of nodding and saying "Mm-hm," but it wasn't conversational at all. That aspect almost put me ill at ease, but I suppose she was trained to keep somewhat of a poker face. She surprised me at the beginning of the interview by asking me about my high school. I hadn't prepared for a question like this, and I kind of stumbled a bit and didn't manage to make the points that I would have liked to make. *sigh* She also asked some questions about what I do in my free time (again, I didn't manage to make all the points I'd have liked to make), what I'm looking for in a college, why I'm interested in Haverford, and such. At the end there were questions and answers, which was helpful to me, and my interviewer mentioned some programs that she thought sounded like something I'd be interested in. I think it was okay, all things considered, even though it was far from perfect.
My MHC interview went a great deal more smoothly. My interviewer was also a student, a senior, and she took down notes the whole time. She even took down at least one direct quote! She was very careful about the accuracy of her notes; for instance, she would read back to me what she had written and ask me to fill in some details she'd missed. She asked me the same sorts of questions that my Haverford interviewer did, about my interests and my high school (I was prepared, though, this time!). She also asked why I was considering an all-women college experience (a question I had NOT prepared for--I am, in fact, questioning how happy I would be in an all-female environment) and why I was interested in Mount Holyoke, in particular. An easier question to answer was the one about my current courses and specifically about the preponderance of math and science in my schedule this year. Then we got to talking about world literature, since I'm trying to get a world lit independent study credit approved by my school's administration (as I haven't got an English class this year), and at the end she gave me a list of Caribbean authors (since she's Jamaican) to look into.
She was very.... affirmative. Even though I stumbled over the question about "Why a women's college? Why Mount Holyoke?" (I confessed my doubts about an all-women environment, as well as my mother's worries that at Mount Holyoke I would have trouble meeting men, and told her that, really, in my college search I have been looking for academically strong schools with campus character, activities, and opportunities that appeal to me; if it happens to be open only to female applicants, then so be it. It hasn't been a criterion, though.)