Assuming you were in YC:
1. Give examples of things you were advised to do differently that added value
2. What did you notice in other startups from your batch that made them succeed?
3. What did you notice in other startups from your batch that made them fail?
4. Any funny stories?
5. What would you have done differently over the course of the YC program if you could do it over again?
I'd love to have a team you accepted on the podcast right after they got accepted and at various stages of the process (at the very least sometime before demo day and shortly after). Basically get a view into the expectations and what helped them most etc.