What makes a frontend feel genuinely good to use?

Frontend development is often discussed through frameworks and libraries, but the final result is experienced by a person sitting in front of a screen.

A technically impressive application can still feel terrible if navigation is confusing, interactions are slow, the interface is inconsistent, mobile behavior is broken, or the user has to think too hard about what to do next.

So what makes a frontend genuinely good?

Is it speed? Accessibility? Visual design? Micro-interactions? Consistent components? Clear information hierarchy? Responsive behavior? Strong error states?

Modern frameworks have made it easier to build increasingly sophisticated interfaces, but complexity can also sneak into the product. Sometimes a page contains animations, transitions, notifications, floating elements, menus, dialogs, and layers of state when the user really just wanted to complete one simple action.

I'd love to hear what frontend developers prioritize.

What framework are you using? What component library or design system do you prefer? How do you test responsive layouts? How do you handle accessibility? Do you optimize heavily for performance, or do you prioritize development speed until performance becomes a real problem?

Share one frontend decision you're proud of, and one frontend mistake you made that taught you something valuable.