First of all, why did you even pick up classes? Isn't the compiler's aide to implement inheritance and virtual functions to complex? Is life too short to learn the syntax? Or would you rather roll your own with function pointers?
Now, having let out some steam, any subset of C++ is a reasonable dialect in its own right. Many people who put C++ on their resume just write C-style procedural code and that is ok. Then people reach into OO things like abstract classes. Then there are standard containers. And then people start writing their own code in that style and we are off to the generic programming domain.
All these are fine tools and it is just an engineering discussion to choose the one that is the most appropriate for the task. The education (aka "C++ style") is important here as things that novice users discover or stumble over have underlining reasons, alternatives and counter parts.
Finally, my personal experience with matter is unambiguous - professionally written high level C++ code is easier to maintain, has fewer bugs and is simply less verbose and more to the point then procedural, lower level C-style code. The only gotcha here is education.