People who are in the early 20s, they don’t like their neighboorhood or cities or sometimes their countries. They want to try something different or a live couple of years abroad. But, they all end up either people from their hometown or nearby countries. Such as: In the USA, Greeks hang out Italian, Turks or Meditteranean people. Why? So obvious. They all have the same and similar tastes.
More similarity increase more chance to be with those people. That’s all-natural. So, don’t worry too much about who you end up with. Follow your similarities.