I've been hearing a lot of comments about how difficult the terrible 2s and/or 3s can be - like it is worse than having a newborn. It's gotten me wondering about space planning. Most people want to wait until LO is about 2 years apart from the next. So for those who have done this - how awful was it dealing with a newborn AND a toddler in the "terrible 2s or 3s"? Do you wish you had spaced them closer or further?