Flair was-is one of the best at committing his character and to his gimmick. Although, if you do some research, the "Nature Boy" had a reputation just as storied as his character.
Part of being a "heel" in the wrestling business means you have to do thing that won't be popular with fans. And AEW wrestler "MJF" apparently takes his job pretty seriously, as he flipped off a seven-year-old kid at a recent autograph signing event...