I did not read all the responses. My answer is not exactly on topic. Rather, I have observed that many people who might be classified as fundamental in thinking generally conform to a more conservative, theocratic, sometimes dogmatic view and oppose more liberal thinking. I think it is a small portion of ubber relgious folks who are truly fundis.
So Dan, I do not consider you a fundamentalist.
Putting on my flame retardant suit here.....ducking a little, JMHO, that I think you are born with the hunger to believe a certain way. Almost how your brain is wired.
So for people who cling to Jesus, God, and a more regimented view of morals, rules, lifestyles, and books that surround such views, I think you either want to believe that way or not. If you do, it could be because it brings you comfort, makes you feel like you live an acceptable way of life, maybe some pride in the morality professed and the respect it might bring from society. I say this because I know certain people that just crave the routine, crave the belief system laid out for them that is extremely acceptable in the world today. Crave that respect of association with a faith. Now I am not saying that it is fake at all, they definitely believe it with all of their hearts. The questions that don't seem to have crystal clear answers for, they don't worry about it too much because thinking the way they do is still a good thing to do.
Then I think there are people who the above type of life is oil to water. They need proof, more logic, less warm fuzzies and more clarity. This is the way their brain is wired. It likely has made sense to think this way for most of their lives, even if it was masked with parental influence or similar.
I equate it to type A, type B, personality traits, etc. I do find this topic interesting and mean no disrespect to any certain belief. I freely admit I am unclear on my exact beliefs and they are still evolving.