mmm.
generally i'd put myself in the agnostic position. like pete, i am of a scientific persuasion, and also frequently find that current science only explains things so far.
my background is chemistry - allbeit organic, rather than quantum - but i could never get past the questions "but what is it actually made of?" and "where did it come from then?" without thinking there may be more than science could cope with.
take matter. an earlier poster commented on the fact that matter had to come from other matter (or some such) - but in actual fact there is no such thing as matter.
i'll explain (kind of). take a piece of stuff, anything. break it down and you have atoms (or ions if you want to get picky). basic high school chemistry. go further those atoms/ions are made of 3 other particles - protons, neutrons, electron. still rudimentrary stuff (and not exactly correct, but simplified). anyway, these particles in turn are made from (in some cases) combinations of other yet smaller particles. now at some stage these particles stop being particles per se, but become nothing more than quantified energy packets.
and here is where the science fails me every time.
Q: "where did the energy come from?"
A: "it has always been there".
this handy little thing called the conservation of energy means that it can never go away and must always be there. it explains the big bang, so far as all that energy in one place creates a supermassive amount of matter, that can no longer coexist in one place, so......BOOM! it all seperates.
very good.
so where did that energy come from again?
oh, that's right, it's always been there........
erm.....how?
so for my mind it gets stuck at this point. until proven otherwise i think there may be some form of something from beyond our universe's existance that provide the initial energy......but then again it might not. i'll just sit on the fence while science decides...
the haydron collider may stuff all this up and confue me even more however (if they can ever get it to work.....) by proving that humans can make a big bang in a lab.