I think my opinion on this changes regularly. My own children are both girls, and almost all of my daycare children have been boys. As the boys are growing up, I'm really wishing I could have found some girls for my daycare. I see how nicely my daughter plays with other girls when we're out somewhere, and it looks so peaceful. But a year ago, I thought my all boy group was great. Yesterday, the oldest daycare boy I have (he's 3) wrapped his belt around his older brothers neck when the mom came in to pick up her. And the mom barely even noticed.