My son and daughter are 19 months apart and baby #3 will be almost 4 years apart from my son and 5.5 years apart from my daughter! So I have had the experience of having kids close in age and then be able to experience further apart in age, he he!
I personally would love to have twins because I have secretly always wanted 4 kids! That way everyone would have a buddy! I do have identical twin cousins, but I have heard that it doesn't run in families and doctors still don't know why the egg splits. My dad is one of 10 children and there were no twins either.
Did anyone do IVF or IUI to conceive your baby? Our friends did IVF and put in 3 embryos and they have healthy twin girls!