Building a product is hard. Designing a product is hard. Creating something people love: very, very, challenging.
A good user experience depends on so much more than a single person’s experience. It requires understanding principles of behavioral psychology, habit-formation, and (sometimes) gamification. It relies on a deep understanding of your core demographic, which in turn depends on the depth and detail of the user personas and use cases you’ve researched and crafted. It means setting the right framework for user testing and asking smart questions to avoid biased results.