Nirvana is the greatest fucking band of all time ! You CANNOT compare them to Led Zeppelin, The Beatles, or Metallica. If you do, you clearly are RETARDED
. It is a completely different kind of music, grunge. It mostly expresses teen angst. Kurt Cobain (R.I.P) supposedly commited suicide, sadly, but I personally believe he was murdered by his fucking wife (Courtney Love). Just read the last for lines of his suicide note ! WTF !?!? The handwriting changes and so doesn't the mood of the letter !!
Although Nirvana's message was that they didn't want to be used just to make money. If you've barely heard any songs by them, get your ass to the store and buy the album simply titled Nirvana. It'll give you a taste of their music and if you like it, go and buy their fucking awesome albums.