Some UX designers (and many clients) aim to "jazz up" the design to supposedly engage users. This usually backfires because extraneous design elements get in the way of users' tasks.

To design a delightful product, it isn’t enough to have your user in mind—you need to truly know your user’s mind. And the most effective way to achieve this is through user interviews.

Jakob Nielsen’s 10 usability heuristics can improve the user experience of VR applications.

Qualitative usability testing aims to identify issues in an interface, while quantitative usability testing is meant to provide metrics that capture the behavior of your whole user population.

Jakob Nielsen's 10 general principles for interaction design. They are called "heuristics" because they are broad rules of thumb and not specific usability guidelines.