When I had my first long term relationship I was 23 and he was 42. We lasted for 2 years until his job took him far away. My next relationship was with a guy some years younger than me and that also lasted for 2 years.
As I entered my 50s I found that the guys that appealed to me were usually 15 or more years younger and would usually be the ones instigating any sexual activity.
I found that 60 was a magic number for me. Once I got there all of a sudden my sex life increased dramatically, not that I was celibate by any means, but suddenly I was hit on by men of all ages, and the majority were in the 18 to 25 group. In the last 3 years I have had 2 guys, one 23 and one 19 who became regular fuck buds. The 23 year old even brought his 21 year old brother one night by telling him that I would give him a massage and ended up with me doing both of them.
So I guess that I love younger guys and am glad that there seem to be many who like older men like me.