C is one of the most widely used programming languages of all time, and C compilers are available for the majority of available computer architectures and operating systems today.
Most of them (with Python being the most dramatic exception) are also very syntactically similar to C in general, and they tend to combine the recognizable expression and statement syntax of C with underlying type systems, data models, and semantics that can be radically different. C++ and Objective-C started as compilers that generated C code; C++ is currently nearly a superset of C, while Objective-C is a strict superset of C.
C is deep. C is painful, but it is fun since there is no comparison.
That's why we feel proud.
Most of the time, what you can do in C, you cannot do in any other language. Think of kernel programming or embedded systems.