You expect me to write one word without writing a wall of text in between? That's not how Dotsya works.
I don't have a favorite word. I like saying "Dotsya", though. In Ukrainian it's actually a form of slang, which is a reference to "little daughter". The word for daughter is "Doch", whereas little daughter would be "mala (malaya) doch". It's the same in Russian. Sometimes mothers would say "Donichka", which is an even sweeter way to say "little daughter", but it could also be used for an older daughter.
Favorite cuss word: Scheisse or Gobshite
Not a big fan of merde.