I don't hate interviews; I love doing them, especially if the model and I have pretty good chemistry and she has some interesting tales to tell. I do an interview clip with just about every girl I shoot. I don't, however, include them in the "Action" clips; I sell them separately.
Occasionally, a model is bad at it; Catherine didn't have much to say and seemed bored by the whole experience. She also disparaged her ex on-camera. (I think/hope I left that part out...)
However, with the exception of "Teri Talks Feet" (because Teri is awesome), interviews don't sell well at all. I think I've sold maybe two or three of them total. This tells me that people don't like them all that much, certainly not enough to pay to see them whether you sell them on their own or add them to existing clips (which, since C4S charges by the minute, drives up the price of the video).
As most people like to forget, what we do is driven by sales. If it makes money, we'll do it, as long as it fits the style of video we're going for. If it doesn't, we won't. Simple as that. Any "Why do/don't producers..." question can be answered with "because it sells/doesn't sell", nine times out of ten.
I do feel that a lot of producers don't know how to conduct good interviews; they mostly just grill the poor girl on her ticklish spots with all the fervor of a serial killer or hint around the notion that they want her to admit that she totally loved the experience and orgasmed like a motherfucker. I like to show the girls having a good time on the shoot. It's subtle, but it makes a difference I think.
(For those of you curious, my interview clips are "A Moment with Ash", "Catherine in: Just the Feet, Ma'am", "Zoe in: Hi, Heels", "Teri Talks Feet" (my favorite), "Kiki: Up Close and Personal" (my other favorite), and the newly-released "Barbie the Pickup Artist").