Not my world, per se, but my country is very big in formality. There are a multitude of honorifics used, and they change depending on your relationship with the person you're speaking with. But in some other countries, you can just use the person's name and we would consider that informal.

[ It's fascinating, but it's also a lot. She's learned to adjust and people have more or less accepted her own manner of address, with some adjustments. ]

Of course, not even in Japan will do this, either. My friend will just call me "Haru", when normally someone his age would use "-san" or "-senpai", since I'm older.