I think I would:
Read more books
Garden in a less haphazard manner
Cook every day instead of large meals for leftovers every few days
Travel more frequently, with multiple visits to the ocean each year.
Watch more movies
Volunteer tutor more often
Do yoga most days and some kind of cardio three times a week
Vacuum more often
Take the dog to the dog park during the week
Have lunch date with my dad
Learn to paint/draw
I used to feel the same way, the work was everything. While work is still exceptionally important, I now define myself as more than my job. Maybe being over forty challenged me to broaden my definition of being me. However, since I'm the person providing health insurance coverage in our family, I'll be employed for a while longer.