Outgrowing Sensible Behavior

While putting cute window clings on my living room picture window, I realized that Ryanne has outgrown such things. I need to find another excuse to act age inappropriately.
My ideas so far are calling myself an artist, which has the most pros. For instance, eccentricity is required and self-discipline is optional. Plus no one really expects to understand what you are talking about.
Another option is to become obsessed with a hobby. Perhaps bird watching. Then I could tell lots of tedious stories and people would feel compelled to listen even if they don't care (which they won't) because nature is in vogue.
If I don't do something pro-active, my neighbors will think that I'm senile which would open up the possibility of going around singing all the time, which I would like. (Singing without senility is unacceptable.)
Nancy Sherer