Age doesn't matter to me but as others have said personality does. I think Jessica Smith, Stephanie Vitorino, and some of the other female instructors on Exercise TV are great instructors minus the bikini body talk. I don't care for hyped-up, overly chatty, whooping, just-had-a-coffee-IV drip & enema personality types
. Sorry, Chalene and Mindy who are both mature solid instructors. I prefer instructors who I perceive as genuinley enthusiastic but not just over the top, enjoying the workout, and encouraging but also not just focused on vanity (getting a bikini body). I like Amy, Cathe, Christi, Lauren Brooks, and the few CIA instructors I have.
I started working out in my 20's to the classic FIRMs. I'm sure they were my peers back then. I still enjoy them. I took a long 7yr break. I still loved Susan Harris when I returned and I now have her Finding Your Core. I'm sure she's in her 40's there and she's still fun to workout with now that I'm in my 40's. I still think she's somewhat cutsey now as she was way back when. On the flipside when I got back into working out, I found I didn't like Tracie Long as much anymore and I couldn't understand why. I remember debating whether to get her Maximum Body Shaping a few years ago b/c I didn't know if I'd like it. But I got it and love it still. Then I got her Fitprime w/o and soon got rid of it. Afterwards, I realized it's b/c she just gave too much instruction for me and was a bit dry, same thing for her Better Body Better Buns. So, obviously I have changed too. Strangely however even though chattiness turns me off, I actually don't mind Leslie in small doses and Kelsie Daniel. I now can tolerate a couple male instructors, too.