At 20, I had a BA in English. At 32, I went back for a MS in Computer Science. At 43, I'm in my pre-reqs for the RN program, while hoping to start in the LPN program in January (get to LPN, get a job, do a bridge so I have the degree plus the hands on...). Who knows, when I'm 54, I may decide to take astronaut training.
The thing is, when I was in my bachelor's program, there was a woman there who didn't start back until she was 67 (she used to joke and say she waited until the kids were all dead of old age, first...). She graduated with her BS in biology when she was 71. She went on to get a Master's in Education!
When I was in the master's program, I thought, "oh, rats, I'm going to be at least 10 years older than everybody else in the program." Not so. The oldest person, again, was in their sixties.
When I thought about going back to school again, I thought, "man, I'm gonna be the oldest person in the program" and for all I know, I may be. But you know what? I don't care. I always wanted to be a nurse, I've done the corporate thing for 20 years (and it sooo mightily stinks), and I've finally got the resources to go back and do what I want to.
See ya out there in class!