I want to solve problems I meet in the daily life by using computers, so I need to write programs. By using Ruby, I want to concentrate the things I do, not the magical rules of the language, like starting with public void something something something to say, print hello world. I just want to say, print this! I don't want all the surrounding magic keywords.
Language designers want to design the perfect language. They want to be able to say, My language is perfect. It can do everything. But it's just plain impossible to design a perfect language, because there are two ways to look at a language. One way is by looking at what can be done with that language. The other is by looking at how we feel using that language - how we feel while programming.