I was a bit surprised to see a few Nirvana haters popping up in the "Glycerin" thread the day before yesterday. Thinking it over, though, I'm actually glad they showed up because it inspired me to listen to some Nirvana, which is always a worthwhile experience:
In general, for a much-praised and undoubtedly influential band, Nirvana strikes me as shockingly little listened-to in practice. Perhaps that's because the band actually sucks and people don't like them, but in my experience people are almost always surprised by how good Nirvana actually is when their stuff comes on. In short, they're not just a band that people say was great -- they're actually great.