How well someone takes rejection speaks volumes about who they are as a person.
There are few more impressive than the guy who, upon being rebuffed, can say that he still likes the girl, perhaps turns his rejection into a joke, and acts amused by the whole thing.
On the other hand, there's nothing less impressive than one who, upon being turned down by a girl, accuses her of being a dyke. (I seemed to know a lot of guys like this in college.)
Similarly, a woman who finds out that a guy is not interested in her sexually and takes it in stride is admirable.
But one who becomes filled with rage and then tells her friends that she thinks the guy must be gay, or suggests that he get therapy for sexual ambivalence, or somesuch, is one with a very fragile ego -- and such egos tend to come with a tenuous grip on reality. (I've known a few of these, too.)