For me (in no particular order),
1: Why does God allow 'evil' and suffering to exist when he is perfectly capable of creating a realistic, enjoyable world without it?
2: Why does God require our approval as an omniscent, omnipotent and omnipresent being?
3: Why does God allow people to defame the idea of religion with crusades and holy wars?
4: For what possible reason would God as an omniscent, omnipotent and omnipresent being want to create us for?
5: Why does God allow Satanistic religions to exist?
6: Why does God allow so many religions of whatever sort to exist in the first place?
7: Why would love such a selfish, parasitic and generally undesirable species such as humans?
8: Where does God come from?