Does anyone feel like they retired too soon? Would you go back to basic to get back in if you had to, if that was an option?

Nope! The Air Force indicated they didn't need my services any more, so I retired. 22 years was enough. If an emergency occurred such that I was truly needed in whatever capacity, I would gladly serve again. It looks like my grandkids' generation has things well in hand.

I feel like I stayed in too long

Hell no. I don’t like discomfort.