I gotta admit to preferring the younger guys, but for me that's about everyone anyway.
Dickheads get filed under "dickheads" and don't get seen at all irrespective of their age.
I find that the younger ones I did see (18-45 yrs) were respectful, I don't know if it was because of my age or not. When younger guys come to see the older ladies it's because they have a fetish for older ladies and it shines through (this might not happen to younger lassies) and a good time is had.
I find that older guys tend to kiss like wet fish or even worse, just purse their lips and expect some life (a bit like them in Emmerdale lately). Not good and when it comes to their sperm I'm not even going to go there at breakfast time. I never have the sperm problem with the younger ones.