Bruce, a MN Galoot
I know you said that your health situation is under control, but the medications you take can have a significant effect on your mental outlook. I'm speaking from personal experience. I was taking a very common medicine that had a profound effect on me -- joint pain, muscle stiffness and as my brother said it it just made me feel old. Doing anything at all was just too much trouble. I stopped taking that stuff two months ago and I feel much better. Projects are beginning to have much more interest for me. It can change your outlook significantly.