Besides diet and health (which are both very important) I find that my attitude and behavior's have changed as I "mature".
Some for the better and some not so much.
I find my tolerance for people (crowds) is next to zero and I tend to avoid busy times/places.
I find I am not very interested in world news, I tend to stay focused on my own business and family.
I find I am more more relaxed when I drive/ride. (if I'm late, I'm late).
I find I pick my battles much more when it come to work. (I stay neutral and positive).
I find that I am ok with being alone more. (I think my wife like it that way as well...lol)
I find that I enjoy fewer things, but I enjoy those few things more.
I find that I think more before I act.
I don't fear death but, I fear being unprepared for it.
Not having kids. I think about my wife and what she'll do when I am gone. (after the party)
I find, I work very hard to ensure "I enjoy life" being and bringing happiness has become very important.