I know it can be tough to accept what mother nature does to us as we grow older......but it is a fact of life. Muscle tone, reflexes, balance, and many more body functions degrade over time.
I still ride and enjoy the two 1200cc cruisers I own, but know it's only a matter of time before the 600 pound 2 wheelers will be too much to handle. That is why I bought my three wheeler a year and a half ago....planning ahead.
So I think you should keep the trike, and get a light weight 2 wheeler (or even a scooter) for when you feel like leaning into a corner. Ya don't really have to be going 60+mph to have a good time.