Nirvana were and to a degree still are the band of their generation. Until they came a long the mainstream guitar music scene was saturated with bloated stadium rock, and big haired rock poodles (Although the underground music scene at the time did have some of my favourite bands of all time). Nirvana took it back to basics in same way The Pistols, The Clash etc did in the mid to late 70s. Balls out, **** have it, heavy music that had something to say. If you weren't there when it happened, or you missed it, then you probably never will get it. If you were lucky enough to be in the right place at the right time, you'll never forget how amazing it and they were.