Growing up, we had a standard collie my parents bought when I was 1 or 2. But due to being the prototypical family of "Jews with allergies", that was our only pet, and when he died at 13, he wasn't replaced. I also had a ton of fish, although I spell it correctly.
I mostly had one dog at a time with my ex, but had two for a stint. We inherited cats from family, and eventually had 2 of our own while the kids were young. When I met my (now) wife, she had 4 cats, and a dog who was beloved by the family, and (supposedly) a good judge of character. He took to me right away, which got me family approval.
We got down to 2 cats, and that's been our number most of the time. We always have a dog, and usually get a 2nd one when the first one gets older. But there was a period when we fostered dogs, and we had 4 of our own then, mostly rescues. We'd temporarily foster up to 3 dogs.
Right now we have the standard mix; 2 cats, and 2 dogs - an older one, and a younger one. We occasionally have up to 2 guest dogs stay with us.