HIStory is complete. Everything that has already been released or leaked is perfect. Isn't 'On the Line' just perfect? Tabloid Junkie? Jesus, I love HIStory! There isn't much more material that's worthy of release. You've already heard some of the remaining tapes. Korg leaked all the good songs.
The entire Invincible era, is trash. Besides 'Speechless', 'The Lost Children' and 'You Rock My World'. There were a few ideas from Rodney and his collaborators. The writing sessions are interesting.
Forget The Jackson 5, Off the Wall, Bad and Thriller eras. The songs are dated. Besides the occasional good song and some pretty cool sounds, there isn't much substance to them. It doesn't help that the recording techniques and hardware weren't as good as they should have been back then. Even the remaining HH songs aren't particularly interesting. There is one thing I really love, though: the writing session for 'Dirty Diana'. Bear in mind that Michael only finished about 10% of the songs he recorded or worked on. Dangerous was his best period. The number of songs he wrote and recorded, even if only partially, is incredible. I could spend hours talking about songs from that era. And don’t forget his amazing live performances.
That being said, Michael was an incredible human being and I miss him dearly.