DJing. I never really got good at it. I could speak in front of people because of the restaurant. I had quick jokes an could project a DJ quality voice. I had a large album collection to draw from.. ... but people are assholes.
Photography... I was delusional that I was good. There's always someone coming up with a different eye, perspective and equipment. Then came the iPhone and overnight the game changed.
Besides... people are assholes.
Graphics... I was a big fish in a very small pond. I got good at making flyers for work Sheer arrogance brought me to the point of breaking out, but.... people are assholes.