The age difference bug will always be there. When I was 20 something all I wanted to do was shag ladies over 30 - mid 40's.
Now I'm 50 something I'm not too bothered. I agree sex is often brilliant with WG's and any ladies late 40's and above. One of my best punts was with a pierced mid 50's milf who clearly enjoyed my cock fully, and swallowed the lot.
But, I've also shagged WG's in their 20's, one of whom I've seen for 18 months, who gets so turned on she absolutely fucks my brains out, gets so wet, and has even asked me to fuck her without (not that I do). I think many younger WG's like to be fucked by reasonable looking mature guys who are experienced.
The point is, it'll be the same with a mature WG for you.