I agree with Tex Ag. I'm someone who questions things, but I don't think that necessarily implies pessimism or a negative world view. For example, I tend to assume good will in people. I'm sure that's colored by my life experiences.
Things are less black and white than they were when I was younger, and I'm more comfortable with the grey, or being in a position of not knowing everything. I may reject some things, or suspend judgement and be comfortable with that. I suppose that implies intellectual flexibility, which hopefully is a sign of growth. In my experience, it's led me more toward a position of humility, rather than arrogance.
In terms of religion, that hasn't led me to live without faith. I suppose it's led me to be more open to the possibilities, and I hope to a deeper appreciation and love for the things that I do believe.
A healthy desire to search and inquire and question is at the root of most scientific endeavor. Thank goodness there are people who are thus inclined.