I improved the structure of the questions:
GOD
How confident are you that God exists?
Does an evidence for [---] (would be) an evidence against God? (How would evidence for [---] affect your confidence that God exists) How confident are you that [---] is true?
GOING TO PARADISE
How confident are you that you will go to paradise? How scare are you to go to Hell?
How confident are you that [---] have souls (and/or would go to paradise or hell)?
For what minimum X are you at least 90% sure that someone will go to paradise if...
If it we live in a multiverse, how confident are you that all "souls" from all universes go to (the same) paradise/hell? (if the same, it means you would encounter other versions of yourselves).
What set of memories do you think we bring with us in paradise (the ones we have before we die? all the ones we made in our life? etc.)
BEING IN PARADISE
How intelligent do you think intelligent humans and extremely severely mentally handicapped humans become in paradise?
How confident are you that there are fermions and bosons in paradise/hell? (if low: does that mean there is not concept of: temperature, light, sound, pressure? can time be measured?)
How confident are you that we cannot feel pain in paradise?
After 3^^^3 years in paradise, how much do you think we can remember?
How confident are you that one can commit suicide in paradise if one wants to?
If you could live for any amount of time in paradise, how would you want to live?
ADVANTAGES
What are the advantages to believe in God (beside going to paradise)? What are the disadvantages?
In the "counter-factual" world were God doesn't exist, would you want to believe in it?
ON EARTH
If you could live for any amount of time, how long would you want to live on Earth? (If more than 1 day, you could ask them why wouldn't you rather be in paradise?)
What do you consider as "playing God"? In what case do you think it is good to play God? How well do you think we can (possibly/physically) play God?
How confident are you that we are in a simulation?
How sad are you when someone near you dies? Why?
What would be different in the world (on Earth) if there was no God?
I am about to graduate from one of the only universities in the world that has a high concentration of high-caliber analytic philosophers who are theists. (Specifically, the University of Notre Dame, IN) So as not to miss this once-in-a-lifetime opportunity, I have sent out emails asking many of them if they would like to meet and discuss their theism with me. Several of them have responded already in the affirmative; fingers crossed for the rest. I'm really looking forward to this because these people are really smart, and have spent a lot of time thinking about this, so I expect them to have interesting and insightful things to say.
Do you have suggestions for questions I could ask them? My main question will of course be "Why do you believe in God?" and variants thereof, but it would be nice if I could say e.g. "How do you avoid the problem of X which is a major argument against theism?"
Questions I've already thought of:
1-Why do you believe in God?
2-What are the main arguments in favor of theism, in your opinion?
3-What about the problem of evil? What about objective morality: how do you make sense of it, and if you don't, then how do you justify God?
4-What about divine hiddenness? Why doesn't God make himself more easily known to us? For example, he could regularly send angels to deliver philosophical proofs on stone tablets to doubters.
5-How do you explain God's necessary existence? What about the "problem of many Gods," i.e. why can't people say the same thing about a slightly different version of God?
6-In what sense is God the fundamental entity, the uncaused cause, etc.? How do you square this with God's seeming complexity? (he is intelligent, after all) If minds are in fact simple, then how is that supposed to work?
I welcome more articulate reformulations of the above, as well as completely new ideas.