Mine are 5 years apart and I love it. However, I do think that much of the sibling relationship is personality-dependent.

We have a three year gap, 1.5 year old and now 5 year old. It’s only gotten more exhausting!! The little one is still not quite old enough to play with our older one. She may always be a bit too young. But it will be nice when she’s like 4 I think.