I've done php, ruby, go, c++, c, java, javascript, and python and I must say I prefer python the most for generic server side stuff. Super well organized and documented. Just the right amount of abstraction. I like c++ for lower level stuff, where python starts to fall off. Go is growing on me but its still so much easier to be productive in C++ in most realistic situations. I use C only when I can't use C++, which is rare.