Now seriously, it's not just the way it looks. If you never spent at least half an hour playing with a language such as python or ruby, you will probably never know what is it that makes programmers all warm and fussy about their languages. Just take a look at array comprehensions (or list comprehensions in python) to know how succint and powerful they are, and how much clear the code looks. It's about replacing four or more lines of js with just one, readable line of coffeescript (or python).

It's all about power, flexibility, succintness and readability, all things that make programming more enjoyable and fun.