This is an interesting topic to ponder. English was my second-language, though at this point it could be considered my first because I don't remember my native Romanian, and so I've always been fascinated with words themselves. It's a fun and engaging exercise to consider the words themselves, not just in the context of their meaning, but what they sound like and what sense they convey in speech and in written form :)
Good comment @anarcho-andrei. I have done the same practice with spanish as well. I don't know if this happened to you, but in your native language sometimes you say a word or repeat a saying but never take the time to analyze from where it comes from, or why you even say what you say.
Oh I know. And when you stop to think about it, sometimes they make no sense at all, and you have to scratch your head and wonder "why on Earth do I use this phrase?"