My T is 30 years older than me, in her late 50s. I wanted a T who was at least 15 years older than me, so I'm pleased with this. My longtime T was 36 years older than me. I did opt to not go with a T who was in her late sixties when I was looking for a T late last year because I didn't want a T who might retire at any moment.

Anyway, I prefer for my Ts to be much older than me. I need for them to have seen some sh** in order to feel like they can handle my crap.

Edit: And wouldn't your T know your age from your birthdate?