in my recollection my biggest issue was how does god listen to all of us if we are all praying to him at the same time? because god works in mysterious ways. so he is some bearded guy sitting on the clouds looking down on us, passing judgement on all the good and bad things we did? of course, i now know even christians believe god is not exactly in human form.
and now? i might say i'm an agnostic with a slightly buddhist bent - the danger with people assuming buddhism as a religion of some sort. buddhist thought at the end of the day seems to be a philosophical way of life - rather than a theology. well, there is a belief in afterlife, reincarnation, and nirvana. i'm inherently very skeptical of other worldly concepts, but... it would be a really easy method to attribute a lot of unexplainable issues in the world. (with all due respect, it is a bit like the hunter-gatherers who attributed everything to animalistic gods)
but there's also enough intellectual gymnastics to play with already...