It's all in the attitude. There are women in their fifties, sixties and more who have keen senses of adventure and exploration, and 23-year olds who do not. I live in a college town that is full of young women 18 to 25, whose bodies make one faint with desire, but when they open their mouths and talk, it is like fingernails on the blackboard.
Among all ages the biggest factor for me is cheerfulness and a sense of humor. Resilience and flexibility seem to follow automatically if these two traits are present.
When I was divorced at 60, I tried dating women in their forties, based on the common assumption that from fifty on women's bodies changed in ways that made sex unpleasant for them. I discovered that among my modest sample, there were three classes of women in their forties.
The first class included attractive and sane and very desirable ladies who were in a good relationship and were going to stay in it.
The second class was ladies, again attractive and sane and very desirable, who were at the height of their profession or career, and while wonderful company, were committed to seventy and eighty hour weeks, and not susceptible to suggestions that we take off and go to Paris for a nine-day week. Alas, these were ladies that were a joy to be with, but usually not available very often.
The third class included ladies who were stark, staring bonkers, including some who swore, or at least suspected, that they had been abducted by aliens, and one who said that her husband had died and left her some money, so she was going to live on that money until it ran out and then drown herself in the Pacific. Er, instead of getting a job maybe? Too gloomy for me. Ladies in this third class seem NOT to be cheerful, and tend to have no sense of humor at all.