Post-Grunge refers to the wave of bands who appeared shortly after Seattle grunge hit the mainstream. The major difference is that while the Seattle bands were firmly rooted in underground alternative rock of the '80s, post-grunge was influenced by what grunge became -- a wildly popular form of inward-looking, serious-minded hard rock. That meant many post-grunge groups imitated the sound and style of grunge, but not necessarily the individual idiosyncracies of its original artists. The angst-ridden, sober introspection typically associated with grunge became virtual requirements in the hands of post-grunge, which tended to view it as a path to artistic legitimacy.