I appear to have something like set points. My obese point is about 200, which I maintained for most of my adult life. Then there was a rapid and scary rise to morbidly obese, which put me around 280, and I maintained that for about 4 years. My current, overweight, set point is about 175-180, which I've been at for a few years now (aside from being pregnant).
Long enough have you dream'd contemptible dreams,
Now I wash the gum from your eyes,
You must habit yourself to the dazzle of the light and of every moment of your life.
-from Song of Myself, Walt Whitman