My interest in alternative music started by never listening to contemporary pop music, ever. At the time all my friends were getting seriously obsessed with Nirvana (14/15), my favourite songs of all time were 'Puritania' by Dimmu Borgir, 'Queen of Winter, Throned' by Cradle of Filth, 'Countess Bathory' by Venom, 'Disciples of Black Sorcery' by Thou Art Lord and 'I Am The Black Wizards' by Emperor. My softer listening was all Dylan, Simon and Garfunkel, Siouxsie and the Banshees and Pink Floyd. I thought Nirvana were lame, and, though I know far, far more about music now then I did then, my initial opinion held, and not for want of re-appraisal, I own two Nirvana albums. Never been able to sit through either of them.
Your friends were getting into Nirvana nearly a full decade after his death?
Aside from that, on topic, Sentenced did a good, if rather bland cover of Radiohead's "Creep"
I personally think that bands shouldnt cover anything released within the past decade. (Exceptions can be made as always, but in GENERAL) Also, if the cover is a note for note copy, just with different musicians, it shouldn't be done. This is called a "tribute" and not a "cover."
Pop artists / groups should stop covering ANY metal songs. I was going to go into a long tirade on cover songs that shouldnt exist (such as "Walk" by Avenged Sevenfold) but then I realised that all the covers I hate are by bands I hate, so it wouldnt exactly be a very good argument, just kind of a "They suck and shouldnt cover good songs"
I also tend to hate on cover albums in general, but Between The Buried and Me's fantastic "The Anatomy Of" album hurts my argument.