We have been here so many times, and I'm sure some of the longer serving critics are probably fed up of hearing my thoughts on the subject, but for the benefit of those who have more recently washed up on El Reg's exotic shores, I offer you this little snippet.
Experiments have tentatively shown that antimatter has anti-gravity - it runs away from matter. The Big Bang could be equally called the great escape, from the perspective of antimatter, as it hurtled hell for leather away from its evil twin.
The physics that brought particles together to form matter, hold no sway over antimatter, so it exists today, in the exact same fundamental state that it was born in, and hence very very small, and very widely dispersed, and still hell tailing it away from all that nasty clingy stuff.
So where is all the antimatter? It really is out of sight, on the edge of our universe and still running at the speed of light away from us, as it has no mass.
Perhaps it is God's means of erasing past failures out of the way of this universe.
or...well most of you have already heard my or, and I'll not make you suffer any more.