How many kids do you prefer to have per couple?

I only picked 4 or more because I feel like it really depends on the sims. If I have a sim that hates children, I won't give them 7 kids cause that's just cruel and if I had a sim with the big happy family aspiration, I won't let them have 1 kid because you won't be able to complete their aspiration. Typically they have between 3 and 8. (I love the genetics)