There is nothing wrong to be shorter or youngerMarried, boring, or insincere guys are not accepted. But I dont think short and young guys are unacceptable . Many great man are not tall at all, such as napoleon, Deng xiao ping. ( the most important part of the body is above the neck) Younger is not sin to be a man, in current world, more and more young guys become mature enough at their young age. They knew much better than some "old" guys. In fact, I do encourage girls who could not find their Mr.Right at this time, dont set so high standards to the fellow men. Instead of outside appearance, you need to see the inside beautify of the man. Be a smart girl, find your dream guy who really cares you and loves you and will die for you . FYI, I am 25, married , I am not the kind of man in any categories you referred. And I do wish everyone can find their dream guy and girl in their life.