As old or as you as appealed to me, if I were dating.
Around the age of 40, I dated in about a 20 year range, up or down.
The 20+ years older had relationship issues, and didn’t get much off the ground, tho I was willing.
The 20 years younger was just stupidity as it turned out. The frame of reference is just too great. A 20yo today is likely to be aware that W’s dad was once president, while I was at Carter’s inauguration. How do you bridge THAT? At least at 40 dating 60, you have a long frame of reference and in 40 years you have picked up a lot of info on the 20 years prior.
Bottom line it’s more attractive to date younger, easier to dated older. If you’re middle aged probably 10 years either way and narrowing at the extremes.