I think the only albums in P's catalog that are better than 3121 are:

1) Sign 'o' The Times
2) Parade
3) Purple Rain
4) 1999
5) Around The World In A Day

3121 is only second to these albums in my opinion.

The bottom 5 of my top 10 would be like this:

6) 3121
7) Dirty Mind
8) The Love Symbol Album
9) The Black Album
10) Lovesexy

I know many of you praise The Gold Experience, but besides "The Most Beautiful Girl In The World," "I Hate U," and "Dolphin" I don't really dig that album. "Gold" is a bit cheesy to me. Diamonds & Pearls had 2 of my favorite P tracks but I doesn't hold up. Emancipation is too long, Musicology is not as good... so basically I don't see an after 80's album that's as good as 3121.