I don't usually show my cards. I think this is important information and opponents should not see which hand I am playing with.
But sometimes at the table I impress some participants and they impress me. In this case, we start our own game. If we have entered the game with such a player in two, then at the end of the hand we show each other the cards. It makes me laugh. I also sometimes fold very strong
hands, fearing that the opponent has a higher combination. In this case, I can also show my cards. If the opponent hesitates and eventually discards (with a large pot), I also show my cards.
But the described situations do not occur so often. Basically, I don't show my cards.