So as Christopher has gotten older, I have never wished to return to a prior age. This fact is a huge part of why we never had a second child. I couldn't do it all over again. I have often wondered whether there would be an age that I wouldn't enjoy and then might look longingly on a previous time. I don't really think that will happen (until perhaps he goes away to college), but you never know.
I do have to say though that I am loving our current age. 6.75 years old is pretty marvelous, and the main reason is that Christopher is suddenly very much in love with me. He will often stop what he is doing to spontaneously kiss me, hug me, or tell me how very much he loves me. It's so sweet. And I know it's 100% genuine. He's not at all saying it to butter me up for something he wants. He's just honestly expressing the feelings in his heart.
Snuggling on the couch when he was sick earlier this month.
I'm not sure that I'll ever want to return to this age once we move beyond it, but I know for sure that I never want to forget it.