After surviving three toddlers with behavioral issues, I'm changing my tune. I didn't want infants, but I'm now of the opinion that I should take them as infants and grow my own toddlers.
The only real trouble I have is when the babies first start walking. Then, I have to strip the play and art areas down to hardly any "things", because the ones who are recently mobile are little destructo machines. The big kids have to wait for baby nap time for things like Play-Doh because the new walkers are so grabby.