You certainly put your mark on that house to make it your own, Steve
. I'm sure you'll be able to do that again for this stage of your life. Unless you move faaaarrrr away, I hope you're still friends with the friends you made while in that house, and old neighbors can certainly be old friends in a new place. And your darling daughter will always be your little girl no matter how old she is. Just so long as you don't move away from DC, it's all good.
I know what you mean about being wistful. I was that way for different reasons when we moved from our first and second houses. Whenif we leave this one? Meh, won't be so sad.