Happy birthday! I have a widely varied set of interests myself. I guess I always thought it was normal and everyone else was singleminded or just lazy. Maybe it is the curse of intelligent people. Look at Benjamin Franklin, he was into everything. Not trying to compare myself to him, but less intelligent people usually stick to what they are good at. Or it is a fear mechanism that keeps people grounded. Have a good time, don't sweat it too much.
I like that comparison! Thanks!