As part of the Shoalhaven and Highlands' widest variety of music I recently had the pleasure of playing Nirvana's Come As You Are!
One of the key ingredients to grunge music, of which Nirvana were at the vanguard, is composing songs in minor keys; it gives the track the unique and dischordant feel that typifies the "Seatlle Sound".
For example Smells Like Teen Spirit is written in F minor...but what if it were recorded in a major key...
Different isn't it. I guess the key is, well, the key!