Seeing those boosters land will never get old. I drive by one on my way to work every day and it's just amazing how large they are.
When I was a kid, I used to watch Thunderbirds [1], which I loved dearly - except that I always thought it fanciful to show Thunderbirds 1 and 3 landing upright back at the Tracy Island base. Many, many years later, of course, my scepticism was erased by watching exactly that happen in real life, courtesy of SpaceX's Falcon 9. Inspirational and astonishing. [1] https://en.wikipedia.org/wiki/Thunderbirds_(TV_series)
https://www.youtube.com/watch?v=loPxTnJc9Zk
I cannot wait for the Starship version...