Well, looking at langpop.com we can see that C is still on top but if we sum all the other top player like Java, Javascript, Ruby, Python, C++ I would say that

Well, looking at langpop.com we can see that C is still on top but if we sum all the other top player like Java, Javascript, Ruby, Python, C++ I would say that OO wins.(I didn't consider PHP because it's a bit of both) Looking at github(http://githut.info/ http://githut.info/) it seems pretty evident that at the moment OO is leading. But I don't think there is a "right way", you should write code in what you are comfortable. Especially for you side projects.