It's all about personal preference.
Females have a heat cycle (not if spayed) they can have weakened bladder muscles when they are older, which can cause them to become incontinent, they can hump like males, although, it's not the majority - most do not.
Males hump (neutered or not - neutering helps clam humping urges) they can be sex aggressive if not neutered, they mark their territory (neutered or not)
Both are at great risk of certain types of cancer if they are not spayed or neutered.
Personality wise, females are very loving, but in my personal experience, my males were just a bit more loving than my females. But I still prefer females because I don't like the marking of the furniture or humping. I have owned mostly females (8) - only one humped. Both of my males humped and marked.
Please let us know when you get your new addition!