Great post, Sal. I feel like I could have written that myself, although much less eloquently.
I look at it this way: truly absorbing and understanding all of Hill's work is a lifetime task. Every time I think I "get it", I hear something brand new.
Plus, hearing Hill's music has caused me to branch off into all kinds of new music by other artists. I'd guess that it has had a similar effect on you?
Incidentally, I'll never forget the first time I heard Compulsion. Luckily, I was able to buy the Mosaic set from a fellow board member!