I second this. After using PHP, Java, Ruby, Python, JavaScript and various frameworks within each, "The C Programming Language" was very refreshing. It's fundamental, and made me think differently when using standard libraries in other languages, such as how they may work, etc.
Having done quite a lot of C myself I believe it's good for a person just starting off with software development, but I can't see myself doing it for fun, besides if I have a specific problem in mind.
