I think the key to remember is that the Majors exemplify an archetype, rather than a particular sex. We are all bits and pieces of many archetypes. Myself, I see shades of Emperor in me, as the head of my family. But I also see shades of the Empress. Not that I'm macho or overly masculine. Just that as an archetype, I can embrace that it is part of me.
So, if a male gets the Empress in a reading, that doesn't necessarily mean someone in his life as indicated by the Empress. Perhaps he's a single father, raising a child. Perhaps he breeds dogs, and they're very dear to his heart rather than a business proposition. Either way, he's nurturing life, as exemplified by the Empress.
As to which would make a good male mate..that depends 100% on the partner. What do they want in a mate? Each person's ideal is different, and what you find most necessary in a mate may give me the shivers. Do they want someone more nurturing, do they want someone with more patience (Hanged Man) do they want someone wise and knowing (hierophant) or do they want someone powerful and forceful (Magician)
Keep in mind each of those traits can be exemplified within women as well though...
Tarot - the ultimate gender neutral advice! (Although sometimes the cards are not I realize)
~Yira