Some interesting (and entertaining!) posts here. Everyone has their own preferences; for some age difference doesn't matter, for others it is a bigger deal.
Personally, I was a late bloomer, as they say. Didn't have my first girlfriend until I was nearly 26.By the time I hit my stride, I found most of my female contemporaries were already attached, married , divorced /separated and almost all had children. Most were looking for security I could not give them (took me a LONG time to realise that!) and so I find myself on my own now, at 45 and wanting to father a child. And when I come across women my own age bracket they have usually already been there.
I also realised a few years ago that I'm more attracted to much younger females; say 18-25. It just turned out that that's how I feel. (I know, wanting to be a dad and attraction to young women ... It's hotwired into us makes) . So here I am. I have a lot of great female friends who are my own age and they're smart and happily married lol. What I'm looking for is difficult, I readily admit. To some people, strange or some kind of mid-life crisis. Hopefully, I'll find her out there.