I think most of these questions are good ones... But I wonder, especially with questions like "Why is there suffering?" and "Why do bad things happen to good people?" would we really want to know the answers, or would we understand them? What if the answer was that the world really wasn't fair? Or there was some big system based on numbers and checks and balances and some people would just have to have bad things happen to them because a certain number of bad things had to happen and their recipients were randomly determined?
Or what if the reason was so complex that we just couldn't understand?
I think people are looking for validation, not to just find out WHY we are here and WHY these things happen, but for those reasons to be comforting instead of terrifying.
I worry that they would be terrifying. I don't know if that makes sense, but I feel that if there is a supreme being (whatever it is) controlling the universe, the reasons for the way the universe works must be so vast and awe inspiring and terrifying that I'm not sure I want to know them, and I know I'm probably not meant to.
That said, I think I'd ask God "Do you like ice cream? If you do, what's your favorite flavor?"