There were times, I used C as default programming language for almost all applications I had to implement, even web via CGI.
Then was Java because it’s cool and easy, then C# because of Visual Studio comfort, then python.
Today I use iced version of CoffeeScript under nodejs but run up to jump into Scala and even ready to burn bridges.
Anyway, it looks like C is the programming language that is always with you.
I have successfully completed the free online offering of ‘The Hardware/Software Interface’, offered by coursera.org. I just received my statement of accomplishment.