1) I hate the Beatles and feel that their fame is more a result of being in the right place at the right time with the right drugs than actually having talent and creativity.
2) I hate that bands like Black Sabbath, Guns 'n' Roses, Metallica, Quiet Riot, Megadeth (their earlier music, at least), KISS, etc. are put in the same genre as bands like Slayer, Brokencyde, Alesana, Blessthefall, etc.. People who are just now being exposed to metal for the first time are likely to be hearing bands in the latter category, and will thus decide to avoid metal altogether (it takes a certain kind of person to actually enjoy people screaming in their ears...). Of course they are in their own subgenres, but only the people who are already fans actually know about those.
3) Rap was good until it was ruined by people like Tupac, Snoop Dogg, B.I.G., etc. It used to be about having fun and expressing creativity in a new way, but in the mid 90's, it was turned into a way to insult people, degrade women, start senseless gang wars, encourage careless sex, drug use for the sole purpose of looking "cool" and fitting in, use of the "N" word for no apparent reason, assaulting people, breaking the law just to break the law, and disrespecting authority for no apparent reason.
4) I don't get why "money For Nothing" by Dire Straits is so popular.
5) Modern pop needs to be renamed in order to separate it from real pop (Prince, MJ, Madonna, etc.).
6) People really need to stop viewing Lady Gaga as this creative, unique artist and realize that all she does is copy Madonna and add in a few ridiculous stunts periodically.
7) Dragonforce sucks (my username is sort of a long story lol)
8) Disliking a musician for their music, unoriginality, behavior, following, etc. is no reason to hate them to the point where you say things like "I hope _______ dies" or "_______ is a __ggot" or "_______ needs to kill him/herself." They are humans too, and being popular and rich for no reason doesn't merit being constantly harassed by jealous losers who wish their favorite genre was as popular (I see this a lot from diehard "metal" fans).