Melancholy is a wonderful thing at times Skip.

It gives you insight into what is important to you that sometimes we are not really aware of.  On the other hand, it does give a real pull to your gut as you realize that this scenario will not happen again.
This becomes immensely greater with older age.  I revere each trip I take, the sights I see, and especially the comeraderie of my Partner Dan.

We only last so long so I try to increase my miles / age as much as I can.