I'm not looking at the moment, but I'm 47 and both of my really long relationships (6yrs and 17yrs) have been with women older than me; by 9yrs(the 6yr relationship) and 5yrs(the 17yr relationship).
I wasn't actively seeking older women, I just managed to find them at work and become attracted to them which led to love and marriage in the second case.
The first woman had two kids who grew into teens while I was still around. I liked the kids a lot, argued with their mom a lot. I actually got along better with her kids than with her (hope the kids and her were able to work out their differences by now).
The second woman actually came to me first (to tell the truth, they all have had to approach me first, usually).
I'm not very good at going out and picking a woman to ask out for a date.
I actually don't like to go around 'looking' for women because it feels like I'm hunting a piece of meat which doesn't feel right when I'm looking for friendship and love.
I don't think age matters as much to me as maturity, personality, intelligence, and of course attractiveness (I prefer women who look natural and not all made up or trying to imitate the latest star).
Having said that, I would probably feel uncomfortable dating someone who was in their 20's or up in their 60's, although just for fun dates with no expectation of a long-term relationship, I could probably date anyone who was of legal age.
I've had an interest in someone who is 16 yrs younger than me, and well, there was that one who is 9yrs older. That would make her 56 now. I suppose that's fine if we were compatible.
Funny thing about age for me... the woman who is 16yrs younger, I thought was more like 20+ yrs younger and I always felt sort of creepy because I found her attractive in so many ways, yet the age difference I thought we had made me feel like a lecherous old man
Being only 16yrs younger doesn't feel so bad, but there's probably too much of a difference for anything to ever happen... well, actually it definitely won't happen.
My Dad though... he picks younger and younger women it seems. He's on his third wife and when I saw her, I swear she was my age... REALLY CREEPY! Turns out she's a bit older than I but still quite young compared to my dad.
My sister's have all gone for older men. Perhaps because they didn't have a father around much?