I guess I don't understand having a favorite number. Why is there a favorite?
Numbers, to me are titles. Magical titles who can switch their name at the drop of a hat without changing meaning. They can dance with each other and become more or less than they were, they can denote both the good and bad, the happy and sad in the universe, they can say nothing. It is hard to explain what manipulating numbers does for me.
Through all of that, I can't say there was ever a favorite number. I do like some methods of changing them though.