Thanks for all the replies - has turned into an interesting thread, which is always good!!!
I totally understand that any Christians will naturally be preoccupied with the more important things in life than these questions, was just wondering if anyone had personal 'answers' to them or not really.
Reading the replies I've realised that my major point in this is the exact nature of God - I've always been 'taught' by Christians I know that he's perfect, infallible etc - but I've had these sticking questions that 'prove' (in my mind) that he must be, to a tiny degree, slightly fallible himself.
And he's supposed to be all-knowing, so can see the future - so why did he have an angry moment and drown people when he knew he'd calm down later, decide the drowning was a bad idea, and sacrifice his own son??
Aloha - thanks for that, I hadn't remembered that point when I started the thread. It does seem really odd that one minute God is supposed to be all loving then the next he's an 'angry' God. And granted, Issac may have been in his twenties but so am I and I'd be wetting myself if one of my parents was about to kill me!!!
And about the giving of his son thing - if you were lonely and wanted to create something for company but could see far ahead and knew you'd have to sacrifice your own child for it, wouldn't you just stay lonely????
Things like this just don't make a lot of sense to me, and I suppose thats because I'm not Christian, and its also why I'm not Christian but whether there are 'answers' or it has to be taken on faith, or not, its good to discuss it.