So, generally, from this post I got 3 things:

1. Karolinka is not a cool name.
2. No place (in Bulgaria) but Sofia is cool.
3. Sofia is THE BIG CITY so it's very very COOL to live there and everyone else is a loser.
4. You are an expert in transportation BUT you prefer to use the opportunity to declare 1-3.

Oh, please, dear Helen, do refute my conclusion!