LOL, I am a sentimental person, and I guess retirement makes one reflective!
It is cool history, you have been around the block and done different things rather than just flow stagnant with the same field. But it is good to look back and reflect on the turning points in your life that sent you in particular directions and chosen forks in the road that led to where you are and who you are. :)
And a lot of it is sentimental. If you had never met particular people or made a wrong turn that ended up positive instead of negative it would have never turned out how it did. Being able to watch something like that evolve play by play is pretty cool and can be sentimental. It is like watching your kid grow up... lol