I have to say my mind above all else. My mom died of Alzheimer’s fairly young and started showing signs in her late 50’s. I am mid 50’s now, so it is a daily worry—especially when I have trouble remembering something. Today it was the country music concert I bought DH tickets for a few years ago. I can’t remember the name of the artist. I don’t like the music so not terribly relevant for me, but still worrisome.
Beyond that my hearing, my sight and my ability to get around and perform activities of daily life.