I'm doing some research on the various ways application UIs have been created ever since computers have been capable of displaying windows. What I would like to know is, what's your favorite and why? Feel free to name any UI creation method you personally enjoy, whether it be for mobile, desktop, the web or something else. It can also be from any time period. Were you a fan of NewS? Adobe Flash/Flex? Some obscure web framework nobody's ever heard of? Tell me why it tickles your fancy.