@Turmoil,
Yes I had a similar experience with the attending nephrologist who I've been shadowing. I was really surprised when I got the impression from other premeds that their shadowing consisted of being quiet and following the doc around.
In comparison, mine teaches me like a med-student (probably nicer), he told me "just following me around won't do you much good, besides look good on paper. I will treat you like one of my students."
It's great, he explains what he's looking for in a patient's chart and what it tells him, he'll also give me the history on each patient worth mentioning, as if I was going to be working in the wards that day. During clinic one-on-one he allows me to engage the patient with simple questions and take notes, which he then compares to what he had to make sure I got important things.
Questions I ask are usually specific to patient care, but we do usually end up talking about what he recommends for specialties and what to do about advancing your career while maintaining a family and broader conversations like that.
I shadow quite often, 1-2 times per week for 3-5 hours, mostly because it's fun and I learn quite a bit. Perhaps he's so mentor-ish to me because he does research on my floor, and we collaborate on projects. Either way, I'm happy its not the stand there and shut up shadowing experiences.