1. I'm much less excited about new gear.

Me too but I like keeping up on new releases
2. I spend much less time in my studio (and more watching football).

I still play almost every day but sometimes its just piano and no Arranger.
More of a get into the music feel to it.
3. My stamina, especially playing organ, is greatly diminished.

We all go thru that as we get older but so far so good.
4. I have much less enthusiasm for rehearsals and find that me and my equally old friends spend more time BS'ing than playing smile.

I don't know if I could put up with rehersals anymore. I just want to do it my way
DAMN IT ! And get off my lawn !!!
5. I find it harder to memorize new songs (and forget them quicker as well).

Never had good memory skills. thank God for the IPAD
6. Just the idea of tearing down and setting up makes me nauseous.

We all hate it but I've gotten down to a managebale size with my stuff. Except
my keyboard stand. I hate it but can't find anything better .
7. I buy all my gear now with no consideration for weight or size. That's because I have no plans to move it smile.

Just the opposite. all my stuff is a s light as can be to get the job done. I move
everything except the FP90 but I do have a case for that if the right gig
comes along.
8. AND THE BIGGIE...I am much less creative; ie. I find it harder and harder to come up with good solos...so far, comping is no problem, perhaps because it is so second nature.

Actually i think I'm getting better. Playing more solo Piano is helping a lot with harmonization and solos. Nothing to hid behind.

I often regret that I did not get better trained when I was younger. When I look at the playing skill of some of the younger players today, I often think 'I could have been that good if only I'd been more dedicated'. As it turned out, college and the military soaked up that development time. I'd like to say "No Regrets", but that would be disingenuous.

I often think that too. the things I spent so much time and energy on instead of
music but at the time they were the most important to me. I wish the Internet
and YouTube were around then. The progress I could of made if I only had all
that info available.