could be a cultural things, but is that way also here in italy.
Masculine or straight acting guys never date more feminine guys.
on this subject I speculated a lot, actually.
I'm not feminine or acting like a woman, but I'm not the masculine type at all.
I don't have problem with more feminine guys though, at least not as much as "masculine" guys have.
for me is a matter of adhering to an archetyp... is like a self defence, or maybe an inconscious bad link with the feminine part of oneself, or with their own homosexuality (sort of reject).
I do like masculine or straight acting guys, and I do know why it happens... is just a stupid but difficult to overcome subconscius mechanism that makes me strive for social approve, even if to be homosexual is not seen or percieved as good from the majority of people.
since I did grow up in this cultural and social background, is obvious that I reacted to my being "different" on trying to adhere to stereotypes, and the "stright acting" or "masculine" is a powerful stereotypes in our cultures.
the feminie guys could be more open about their sexuallity, at least uncosciously, or could just be that they adhere to the female stereotypes, looking for social approve as much as the masculine ones (at least, even if we are gay, there is a inherent strife to look for marriage and recognization by the society, and adhering to the "normal couple" stereotype is a way to cope with our own homosexuality)
this doesn't mean anything, nor that the feminie guys are better or the masculine ones are... just I noticed the same too and I couldn't find any other explaination that wouldn't involve subconscius levels and how ones develop their own sexual orientation.