I found a very nice quote from Ken Thompson and Dennis Ritchie, fathers  of UNIX, that I really like:

A powerful operating system for interactive use need not be expensive either in equipment or in human effort. We hope that users of Unix will find that the most important characteristics of the system are its simplicity, elegance, and ease of use.

There is no need to say anything more to that… That is why I prefer Linux and other UNIX based systems.

Happy birthday!