I find women in two age ranges sexually attractive "22-26" and "36 to 45".
Women ages 22 to26 are just fun, and with me being 30, dating them feels almost nostalgic. Their youthful looks, playful attitude, and a somewhat innocent outlook on life are very attractive. If you get in their good side---which I was horrible at when I was that age, but not too shabby at now---they'll flirt with you in a way that older women just can't do. And if you teach them something they think is cool, they'll look up to you. Also, they're usually not yet at the stage where they want to settle down or have a baby.
I also like women ages 36 to 45. They're older and more experienced with life, and pretty much cast off most of the negative aspects that younger women have: hyperfocus on looks, materialism, etc. They're also more sincere and straightforward; that is, if they find you attractive, they'll get touchy-feely with you right on the spot. This makes it fairly easy to know where you stand with a woman in this age without having to wonder. They either already had a kid and got their "fix", or fully gave up on the idea of babies.
Women 27 to 35, near my age, seem to have the worst of both worlds. Their innocence and playfulness is already gone, but their wisdom and straightforwardness is still not there. Plus, many of them are in a rush to settle down and/or have babies, so I have an intense fear of them trapping me. That is, impregnating herself with my "body fluids" despite me using protection.