My boyfriend actually said the words " I think we should get a cat" the other day.
I'm a dog person and while I'm sure I could grow to love any animal brought into my home, I will always, always choose dogs. So I was flooooored when he suggested a cat.
If my significant other really wants a cat, or hamster, or snake, and it was financially doable for us and we had the time to care for it then sure, bring it on in!
But I know some people that are like "I will not marry a cat person" etc. My mom for example, has a strong cat allergy so if my dad had been a crazy cat person (which he is not) he essentially would have had to choose: cat or my mom. (Unless he got one of those scary hairless cats lol)