Tricky one for me when the debate of Invincible always arises.
It was a different concept for Michael IMO - I think the direction he took with this was completely intentional in terms of creating something to either debate, change direction or show that a 43 year old was creating new popular cultured music.
We have to remember the direction that 'music' was going in at this time, not just MJ, funky slow jams, R&B, 2001 was a time when production was starting to be recognised as much or more than the artist itself, people become far more conscious of who was involved in the creating of the album as much as who is the artist.
Darkchild was young and fresh and was the sound of the era (Brandy, Destiny's Child etc) having huge hits in his brand of music. Rodney Jerkins also stated himself that the original material he present/they worked on with MJ was more like 'his older sound' (You Rock My World was a an example of this, as this is one that MJ kept) but the change of direction on the album on Michaels part I feel was to set/break his personal boundaries again, and to push himself - Lets face it, we had never heard a sound/vocal like 2000 Watts from Michael before, maybe it was us the fans that had the real culture shock and not the direction that MJ was going was the actual issue. I remember playing Invincible to a friend when we was on holiday in 2003 I think it was, about 3/4 years later he text me saying "Music on the radio now sounds like what MJ created on Invincible 4 years ago" For me, and for him showed that Michael was ahead of the game again, no matter whether we liked the music or not, MJ always had an art of creating timeless music, I think Dangerous and invincible are the best examples of this personally.
In terms of the material, Whatever Happens, You Rock My World, Speechless, Butterflies I think are top top MJ tracks, a real credit to the album, I have no issues like many do with 2000 Watts, the fact that MJ took voice training to hit these low notes at 42 showed his dedication and his want to change perception of music and possibly his music.
The album to me is wonderful, I love the older sounding Michael, I think his vocals are the best they have ever been, crisp, sharp, rough and delicate.
The album is what it is, it is the marmite of MJ albums
At the end of the day, we are speaking about the direction of the album and what we love and hate about it 15 years on and 7 years after Michael's death, isn't that so MJ? The fact we have the feeling around the album after this longs shows that MJ's objective to creatively shape his future sound, got us all talking.