I question everything. It is fundamentally a part of who I am as a person. When I say I question everything I mean it. I question politics, I question military, I question relationships, I question religion, I question existence, I question social norms, I question that fact that 1+1=2, I even question I question why I should question things in the first place.
I do not think it makes me smart. I just know that I take nothing for face value from anyone: my parents, my friends, my colleagues, my boss, none are immune. Questioning everything is a practice that has brought much pain as well as much joy. To not question things would not be me.
How deep do you question things?
EDIT: Literally, if you told me the world is round, I would probably ask you why. And simply saying "because it is" or "because we can see it" is not a good enough answer for me. Our perceptions are fallible, and thus we can only depend on them to a certain degree of accuracy.