Cutting to the chase, men are naturally drawn to women in their 20's(especially early-mid 20's) or even 18-19 regardless of our age. Of course, there's beautiful women in every age group but that's usually deemed to be the peak attractiveness for women.
However, age gap relationships aren't really too ideal because they're arguably the most transactional of all relationships. If a guy is okay with this arrangement, that's cool. But, often times, the young girls in age gap or sugar daddy relationships openly cheat on their older boyfriends with younger men and the divorce rates for them are the highest out of any group.
So, for a quick fling or sex, it's fine to go after younger women. But getting into an actual long term relationship or marriage with one is a different ballgame. Even Kanye's new wife(who's 27) has a career at his own business.
I've dated broke, young college girls before. It was fine for a few one night stands or flings but, for dating, they ironically can be more demanding than accomplished women because they have less understanding on the value of money and budgeting. My current girl is 2 years younger than me(I'm 30) and she has a good paying job just like me and owns her own car and I actually find myself less stressed than when I was trying to take things serious with young college girls.
Everyone's preference and experience will vary though.