In light of the OpenAI shakeup, many here have pointed to Altman's goals with the project being ones most don't consider the most important (money, reckless use which many enhance government/powerful control), and a 'personality that is required for this kind of thing'.
What questions or things can we talk about with tech CEOs (and others in decision-making positions, to get a grasp of their morality/personality?
People can present themselves differently than they are, and especially people with lower morales will have no problem presenting themselves differently if that is in their interest. Look at pretty much any big company CEO.
If you do need to gauge someone, look at their history, look at their actions, and look at their incentives. If they don't align with what they're saying you should not expect them to act any different than they did before.