91 - Fat Boys and NWA break up, Vanilla Ice blows up, east coast takes a plunge
96-97 - Big and Pac die, jiggy era is born, Dre releases that Aftermath and Firm shit
2000 - Pun dies, Nelly debuts, only a handful of notable albums are released
2006 - Snap music hits mainstream, cats like Jeezy, Ross and Wayne lower standards of lyricism, Jay drops a half assed comeback album, feelings caught over the term "Hip Hop Is Dead"
2011 - All of the above culminates to the mass public accepting mediocrity, rappers releasing half assed albums, monotonous production trumping over lyrics
DISCLAIMER: This may sound coast biased or whatever, but that's not what I'm trying to get across. Just my thoughts on what ruined a year for hip hop, and all of our minor missteps making the problem bigger. Add on.