I did... as a kid I recall school teaching Christianity as if it were fact, and I bought it because I thought schools were supposed to teach you things, not tell you unsubstantiated nonsense, or subjective truths. I believed it with all my heart, I prayed, I worried about whether I was upsetting God in any way, and I worried for others in this way, etc. etc.
As I reached my teens, and started questioning things more, life as viewed through the lens of religion started to make less and less sense, until I just couldn't say I believed anymore. It's impossible for me to "try" religion because I would be lying to myself.
If there is a God, he's certainly gone to some length to make a number of people who just feel completely unsatisfied with the worldview it provides... Some religious factions would have me believe that you can choose to have faith, but I know deep inside that I just don't buy it. Why on earth would God make me this way if he/she/it exists?