The gender really differs as to which breed you are talking about as well..
In Shelties - both male and female are supposed to be(if well bred) very friendly, active little dogs, obedient and natural herders..
however in males - they will mark(if unfixed), get excited easier etc.
in the females - they do have mood swings in their heat cycles, they can be more of a home body and they can be fairly picky to get to pee when you want them to go
in Belgians
males - territorial, male to male aggresion can be present, marking,
females - can be "bitchy", not as easily distracted
these are unaltered dog things I have noticed.