So your little brother likes Green Day. "He'll grow out of it" you say. You try and explain to him why Green Day is overrated. He just isn't having it. Instead of giving him a wedgie, and locking him out of your room, you can discuss it like civilized adults.
So many groups or solo artists ride the wave of celebrity, but can't back it up, while others struggle in relative obscurity when they really deserve the attention of the masses.