"Lack of creativity" is a valid reason for hating an artist. Think about all of the great singers/rappers/songwriters. Why were they so successful? Because they were creative, and different. If Tupac Shakur stuck to the old shitty 80's rap; would he have been so legendary? Sure the overall talent of the artist has to do with it, but the ability to be creative and produce something orginal is what separates the good from the great.
/Case closed.