@ Ambalon - Pretty normal, I'd say. I was agnostic before I became agnostic-atheist.
Anyway, funny thing is, while most of my atheist friends were rebelling against religion and their parents, I was a dyed-in-the-wool kardecist, esoteric, and overall superstitious. I tore through spiritist books and acquired quite a lot of "knowledge" in that particular religion.
Then, when I turned 18, I started talking to one of my oldest friends, who is a very resolute atheist, about science, religion, everything. In the end, though he didn't "convert" me per se, he did spark in me a love of science and secular philosophy. In the end, my critical thinking started kicking in, and I started asking myself lots of questions, questions I did ask myself before, but was not entirely honest with myself about how I felt about them. I stopped going to the spiritist centre, and dropped the whole doctrine and dogma like a sack of bricks, but I was not quite ready to let go of the IDEA of god. That's the phase of my life I call my "agnostic" phase.
Finally, when I turned 19, I no longer believed in god, and broke it to my parents, who were pissed, but couldn't do shit, because they had always been liberal regarding my choices in life. Funny, half of my friends who were militant, rebellious atheists are now back in religion.
I can honestly say, becoming an atheist did change my life, and definitely for the better. I have a critical thinking I did not have before. I see things in a way I did not see before. I have a freedom I did not have before. No more useless guilt, no more pressure, no more feeling of worthlessness. It's great.
Some people are going to be pissed at me, but I've been to both sides, and religion, scratch that, belief per se, is a shackle that binds your mind. It makes you think in one direction, all the time. remember that game we all played as children, the one where you couldn't step in any line on the floor? Religion is like spending your whole life playing that game. Following a set of rules made to appease something that doesn't exist.