what makes for Good UX
Short answer
The invisible hand, felt.
Long answer
Good UX is not a feature you add at the end. It lives in the shared language a team builds together — the ability to look at something and agree, without hesitation, that it either has quality or it doesn't.
One practice that sharpens this: gather regularly, bring examples of design you've encountered that week, and critique them live. What works, what doesn't, and why. Over time, this builds a collective taste that quietly raises every decision the team makes.
What endures in good UX is legibility, information hierarchy, and pacing — how you move someone through an experience with the right economy of means. The best interfaces feel inevitable. You never notice them at all.