I have tried to keep notes but it boils down to how I learned. I don't have to print someones reorder where it is critical that the prints match and I do sometimes change a lot of stuff in the print from the last time I print a particular negative. I do keep a work print and on the back I will note the type of paper it is and the hard time and the soft time if split printing and the dry down % but that is about all the note keeping I do. I make a new test print if I want to reprint the negative.
I have tried to keep better notes but I just ain't that kinda guy. But like you Michael, I would be interested in what everyone else does.