Mine are 12 years apart, not by choice. It was infinitely helpful to me to have a second set of hands to help out. They are like siblings in some ways, and like two only children in others. But there is no sibling rivalry, no vying for attention, as mentioned by others here. I'm not sure how I would have done with more than one in diapers at a time, so in hindsight, my situation was perfect for me. Whatever happens for you, go with the strengths and enjoy it! :D