Great post, Burt.
I am 44 going on 45. Do I feel middle aged? No I don't. I don't really consider my age at all. I just feel like myself and that person feels younger than my physical age.
At this time in my life my focus is my spiritual healing and growth. It is a good time for me because I am finally figuring out who I am and what I was meant to be. I am more thoughtful and focused on the inner me. It is a more peaceful existence than what I have had in earlier years.