I'm always told that I should repent, I will have to account for my non-belief when I stand before God, and so on.
Here is my response, I'm sure many others have thought of this.
If God is all-knowing, he must already know my future.
If the future is known, then there is no such thing as free will. (See determinism)
So either, God did not give us free will, or he doesn't exist.
So Christians try to argue that God knowing our futures doesn't make free will impossible, which is BS. How could you choose something before you are created?