<< Their albums oldest to newest:
39 Smooth - Heard it was good
Kerplunk - Good ol punk-rawk
Dookie - Excellent Album
Nimrod - Another Excellent Album
Insomnaic - Not very good, but has 1 or 2 okay songs
Warning - Okay, but I was kinda disappointed
I have them all but 39 Smooth.  I don't care what people say about Green Day, they are still one of my favorite punk bands. >>
Insomniac came before Nimrod...
Anyway, I haven't heard much of Nimrod or Warning... but their other albums are great. Dookie was a real breakthrough for the band (and then all the sell out comments started...)
-geoff