For me, I highly dislike Fall Out Boy, Panic! At the Disco, Nirvana (actually, most classic rock, sans Queen). See, I understand that classic rock was the basis for the modern rock I like today, but that doesn't mean I like it. I also highly dislike Fergie, Hannah Montana, pretty much all rappers (specifically 50 Cent, Eminem, Soulja Boy, and Snoop Dogg), Sean Kingston, Gwen Stefani (but I like No Doubt ^^), Jonas Brothers, any Disney Channel "celebrity" who thinks they can sing, Hilary Duff, Rage Against the Machine, and most metal bands. I'm on the fence with Avenged Sevenfold, and I really like MCR, actually.