I didn't care when I got my dog (female weimaraner spayed)but now I prefer females. There are no territorial issues for her with other dogs at all, she actually ignores most other dogs and only wants our attention.
In Israel, where neutering is very rare (macho-ego thing) It is difficult having a male you have to be on the look out all the time.
I think that raising several dogs in one household can also influence their personality development. If there is a dominant older dog, the younger may be less likely to be dominant. He learns its safer not to be and accepts the older's dominance. This may not necessarily be age related.
I know a wiemaraner father and daughter who live together and she is very submissive. She doesn't exhibit typical weim hyperactivity and aloofness (when outside playing) but approaches strangers to be pet like a golden retriever something my dog would never do.
When we rescued a male german shepard my female was very dominant over him even though he was literally twice her size. (it was her house first). He humbly let her have her way.