To be fair, Sixteen Stone should have had a nomination. Had I actually researched albums that weren't included I probably would have told our row boat peter puffer to fuck off.
Self admittedly, I'm not a huge Nirvana fan ... but the Unplugged album was tremendous and probably opened my eyes to giving me much needed respect for what they accomplished
Add into it essentially it being Kurt's swan song and it gets a little bump for me as a result