I'm a Chronophile.
I'm 26 y/o straight male. I have this strange fetish for age gaps. Particularly, I like teens (the legal ones, 18-19), and mature women (34-45ish). Women in their 20s just don't do it for me.
I've had my share of flings with both age groups but my ultimate fantasy would be both at the same time, the best of both worlds.