I know it made history and all but, personally, a classic album should be more than just decent musically.
But it is more than decent musically. Just because it's not your cup of tea does not mean that it's not decent.
I am a 1990s guy. Those are my high school to college years. And you can not say you are discussing 1990s music if you do not include Shania Twain. Kev, bring in Tina Arena also so that we can increase the hotness factor here.
And for that matter, if we really want this to be a 90s classic albums thread, we should be seeing more Boyz II Men, Maria Carey, and at least one boyband album. Like it or not, the 1990s are not complete without them. I am still waiting for New Kids on The Block to show up in the 80s classic thread.