I don't see why so many people think of typography and color as central to UX/UI. I believe these are just as small part of the puzzle. Great interfaces are not just nice to look at - they communicate well. For me, great UX/UI is about the use of clear, consistent visual metaphors. It's about choosing the right words in your navigation, picking the best controls and form elements, and about removing anything that distracts or confuses the user. It's also about listening to your customers and understanding how they use your software.