I am in my late 30s and love shagging both younger women and women around my age.
I think in general it is good to spend time with younger people to stay in touch with the changing world. This is true for both friendships and also shagging. I find I learn a lot when I shag younger WGs.
Funnily enough when I was younger, i absolutely loved MILFs because they were able to teach me things women my own age couldn't. I have also found I get more attention from younger women now I am older.