Ask HN: Examples of lovely user interfaces on and off screen

Hey HN - I'm on the lookout for lovely, surprising, intuitive, playful, fun "user interfaces". I'll take anything on a screen / touchscreen / mobile - but I'm also interested in "in the real world" examples - are there nice things that have cheered up your day because the design thinking has been thoughtful or nicely simplifying something that could otherwise have been complex?

I'd prefer to avoid examples of crap stuff - it's so common (sadly!) to find people writing about examples of terrible UI's - I'm specifically on the look out for good ones!

thanks xx ;-)