Firstly, I will point out that I'm an adult learner; I took my original GCSE's before you all were even born! Some things on here really surprise me; I went to a good grammar school, but despite this, very few of us were predicted straight A's (There was no such thing as A* back then). We generally took 9 - 11 GCSE's, I don't know how you fit 13 in! It sounds like you're all very motivated and have worked hard, well done.
I just sat a Psychology GCSE purely because it's a subject I'm interested in. So, in answer to the OP's questions;
What am I hoping for?
A* as I've never had the chance to get one before!
What am I expecting?
A
Will I be satisfied with my expectation?
Yes, I worked as hard as I could.
How will I open them?
With shaking hands...
How will I celebrate/react?
We're all going for a pub lunch regardless of results. So, good or bad, at least there'll be food.
Will I meet my 6th form/College offer?
I'm 37. I won't be going to 6th form.
Good luck everyone!