Nothing pisses rock fans off worse than the lead singer of their favorite band being replaced. This happens across genres, but it's most common within hard rock -- pop, country and R&B vocalists' departures are usually a precursor to their solo efforts; very rarely does their band continue without them. Hard rock and heavy metal fans, on the other hand, see their favorite bands as a cohesive unit, so when a singer leaves, the rest of the band often make an attempt at continuing without them. Additionally, metal singers are more likely to storm off and leave a popular band -- they're apparently a moody lot.
