This is my opinion on the subject, not facts, based purely on personal experiences and observations of friends, neighbors and business associates:
Men here, both straight and gay, tend to be a lot more expressive and emotional, don't forget -- you have a DOUBLE dose of "latino" with the majority of Argentine men, the "Argentino Estandar" is 1/2 spanish and 1/2 italian descent. So if you like men who say they love you, touch you all the time, want lots of kisses, hand holding, and expect you to be "pretty" all of the time for them, well then you will be happy. The flip side is, they will constantly be telling you how they feel, cry at the drop of a hat, and want you to meet their psychologist, will ask you to squeeze the puss out of pimples on their back, will wear rings on their thumb and pointer finger, and tie their long hair back in a pink scrunchee (that belongs to you) without even thinkin about it, oh and if you serve them food that they don't like they will straight out make faces, get up and go buy empanadas and sit on the sofa eating them while watching Shrek. Anybody else have a similar experience?
As for women go, I have less experience, as I play on the "other team". However comparing the women here with the ones I've known from the USA or Europe, the women here are more like European gals. They look and act like girls, wear sexy clothes, makeup, hair styled, act shy around guys if they like them, and watch their figure. Many of the women in the US that I've experienced lately act like truck drivers, talk loud with their mouth full, wear miniskirts even if their legs are white and lumpy like cottage cheese and veiny like gorgonzola and get really weird hairdos and walk around looking like teletubbies. Argentine women are a lot more traditional and careful to keep up their appearance. My one gripe is that too many girls here smoke.