Some modern stereotypes have their roots in classical and medieval Christian thought. But not all. *shrugs* Definitely the idea that women are more emotional seems to come from classical thought. As did the idea that women (and men) should be restrained and chaste. (Although women often weren't assumed to be all that chaste - it was more that they should be than that they were. Many medieval primary documents seem to point out that men need to help women restrain themselves from their bestial impulses, as OMG were they ruled by lust, those crazy women!)

The Celts (or at least the Irish) definitely seemed to go for the hot headed men (who were regularly pretty stupid. Oh well...). I'd argue that the Myceneans probably did too, considering that Achilles is their main hero. And, yeah, women do sleep around (not always without censure, although sometimes), which is different. But, yeah, lots of differences. And I agree that when you get a pagan Celt behaving just like a modern day person (or Elizabethian Englishman) that it really does throw things.