I have a problem with the overused term and concept of “intuitive.” I don’t think “intuitive” is itself intuitive. So here are some quick redefinitions of my UI/UX checklist: Is the interaction obvious? (probability of successful interaction [p] = essentially 100%) If not, can it be made obvious? Is there a clear affordance to the interaction? (p >= 90%) If not, can it have a clear affordance? Is there a statistically significant probability of getting the expected outcome from the interaction?