Wow, what a garage - yes, I have garage envy for sure!
One thing I put in my garage is a "slop room", almost by accident but it has become such a valuable asset. It is an enclosed space where I do my dirty work, like grinding, spray painting small parts, bead blasting (cabinet), cleaning greasy crap, etc. Mine is very small, and since I never really planned it in advance, I didn't realize how valuable a "slop room" is. I wish it was much bigger.
Anyway, do you have a dedicated, enclosed space for dirty work? I have found that so much of the car hobby is cleaning old, dirty, rusty crap! With an awesome garage like yours and with all that space, a decent "slop room" would be a great asset to keep other areas of the garage cleaner.
Regardless, I am a fan and wish I had even 1/4 of your space!!!