I don't think many are 100% of either, but I'm well aware of what I'm not. Though I have been helped tremendously by some great conservatives with hearts and some liberals with brains.
"If you aren't leaning left when you're young, something is wrong with your heart, if you aren't in the right when you are old, something is wrong with your brain."
I'm young and poor so it's easy to see where I fall, but I'm left of liberal, so maybe when I'm your age I'll have slid back to the middle.