An agnostic is a person who understands the fact that, logically speaking, one cannot 'prove a negative'. Therefore, I cannot prove that God doesn't exist. So, although it seems unlikely to me, there remains a possibility that God does exist. All I would need in order to BELIEVE is some proof.

Tsk. By that measure there would be no atheists. The person who can prove that God does not exist has not yet been born. But that is not the point. The point is that religion has deliberately put "God" into a place where his non-existence can never be proven. I can come up with all sorts of imaginative notions that you could never ever disprove. Seven-legged green men inhabit the rings of a Saturn-like planet somewhere in Canis Major. You, er, know that this is really not the case, but you can't prove it isn't, But that shouldn't stop you from taking a bold position about it (if you can be arsed, of course). If you say you're agnostic about it, you're playing their game, falling into a cowardly trap. You give them the initiative in being able to say that you've admitted you can't prove it's not true, when, in fact, you ought to be saying don't be so bloody ridiculous and stop wasting my time! The chances of its being true are vanishingly small, well below the credibility level of even the most credulous. If you think that about the probable non-existence of God, you're a good atheist. If you claim to be "agnostic," either you can't be arsed even to engage with the issue (an honourable and sensible position), or else you simply lack courage and are soliciting death-bed insurance!