Ah. Just a tad confused because there's a couple of commenters on lj who have a tendency to describe Cho in a similiar way, and what with this discussion encompassing so many different female characters...

Much as I detest Ginny; Harry's kind of immature and spiteful himself (and we know how badly he takes to losing, of course). YMMV, naturally. Of course, since Ginny's whole character is based around being like Harry (sharing his friends, interests, talents...) I guess that's not surprising.