Well it is common for people in Southern Europe and I'm unaware of how it is in Western Europe.
Oh!  you could perhaps move away from Europe and North America and move to, say Japan where it is way less common.  You'd stand out more!
I have brown hair that's so light that when you look at it under certain types of light, it looks blonde! Interesting, do people mention how that's the second most common hair color? I haven't but I don't quite like brown. Where is it most common in so I avoid them lol I want to stick out! Well, the places that brown hair is quite common would be places such as Central and Eastern Europe, the US, and some Greater Middle East populations to name a few spots. Ah okay, that's a shame as some of those places are where nice art is at. How about South Europe or West Europe?
Brown hair is common among populations in the Western world, especially among those from Central Europe, Southeastern Europe, Eastern Europe, Southern Europe, Southern Cone, the United States, and also some populations in the Greater Middle East where it transitions smoothly into black hair.