@Jerry Nihen Thanks, Jerry. I think as long as you approach it as "I'm doing this because I think this is fascinating and I want to learn how this person does it" as opposed to "This is a job and here is my list of questions", the interesting part gets accounted for. And of course a little Googling, to see what the interviewee has said about him/herself in other interviewees, and take on from there instead of going over the same ground.
@JoeCardillo True. One question I ask often is "What do you hate doing but have to do in your work?" Some people say "nothing", but sometimes you get an interesting answer!
@LouHoffman @yvettepistorio Agree with you both! Email interviews are much easier, of course. But live interviews are so much fun (though a lot of work, as you say).
@LouHoffman Thanks, Lou! I agree totally -- an interview is such a great way to reach out to interesting people and get great content for your blog!