We have 3dcs 21mth between1&2 24mth between 2&£
Overall i would say all things considered 21mth gap was easier dc one wasnt bothered by the baby at all!
But i think in some ways a 3yr plus gap would be easier for the parents..3yr old can do alot more for themselves (just small thing obviously-getting dressed etc)
Im asking as when dc3 arrived it was 6mth until dc1 started school and those 6mth were tough..now she is at school i still have 2 at home but its alot easier! DC1got harder to entertain once ready for school.
We are now considering no4 but i know i would cope so much better if dc2 was at school..but ideally we want a smaller gap dh is 36 and saays he would like no4 asap