You know what's weird? Being human. It's so normal, but so unknown as well. I can't tell you how many times I have surprised myself by reacting to situations or people in a way I never thought I would. Or by feeling a certain way and not knowing why. Or loving someone I never thought I would even like at all. I am me, but there is so much about myself that I don't know or understand. How can you be something and not really know what you are?
Combine that with the fact that we are always changing, being exposed to new things and learning and we can't control our environments, so the variables for possible outcomes of behavior, thought, reaction, emotion and what-have-you are endless.
It's just so cool and so weird.