I may just do that!
I remember when my boys were younger DH sometimes would talk about what we'd do when they moved out, as we had the elder two at 22 and 23 respectively (they're 18 months apart) so when they did reach 18 and went off on their own, even if they waited a couple years we'd still be relatively young empty nesters. Course this was before Littlest Pirate came along but even still we'll be in our 50's which leaves a good amount of time to do our own thing provided we keep ourselves healthy and fit.
Anyway, my mom used to say, aghast "What's the point of having kids if you're looking forward to getting rid of them?" I remember thinking "What's wrong with having a healthy acceptance of the fact that we will one day be empty nesters?" We know they're not going to live with us forever and it's not like we're going to be booting them out the minute they turn 18, for crying out loud. We're not looking forward to getting rid of them but we're not going to be hanging onto them, either.
I think you both have a healthy mindset, especially because DH & I share it!
We moved to an area of large, very enmeshed families that go way back. We, ourselves, are rather transitory and so were our parents. DH & I are already laying plans for when the youngest moves out (we still have both - they're 18 & 16). We were together first and when the kids are gone, we'll just have each other.
I can't quite comprehend seeing some of my friends that appear to fall apart emotionally at the thought that their kids are doing the normal things that people do: moving out, getting married, moving away, having kids, etc. My parents always had the attitude of 'we love you and hope that works out for you' whenever we had a life change. They also supported us emotionally from a distance and took pains to visit us wherever we lived.
Some friends of ours married off their two sons in the last year. One of them stayed in their area and the other moved to my area, 30 minutes away. 1.5 years later the other son and his wife are moving to our area. The wife is crying all the time. They're 30 minutes away. I'm sympathetic but I cannot empathize.
My DH's parents are similar in that they are not enmeshed with us but that's because they could give a rat's behind about us. I will say that for all my MIL's faults, she's always respected our decisions as being ours to make.
And seeing some of my friends actually...handicap their kids so that they can't/won't move out...well, words fail me.
I've had several people tell me I will completely change my mind about the chicks leaving the nest whenever I discuss the experiences and adventures I'm encouraging my kids to pursue. I just smile and say 'okay' but I really believe, in my heart that I won't. Because I simply wasn't raised that way. I want my kids to travel, meet new people, experience new things. And then call and visit to the extent they are able and tell me all about it! The best chance for them to be able to stand on their feet and be contributing members of society is if we work hard to make them that way.