Madame X could be one of my all time favorite albums. I have been excited about it since last year, and it has exceeded my expectations. (I only had to delete Killers and Dark Ballet!)
The other albums are strange. I had no problems with any of the collaborators, in fact in each case I was excited, and then felt underwhelmed with the results. I remember playing Hard Candy a lot, but now the only song I would bother with would be Give it to Me. The same with MDNA, I would only listen to a few songs: FF, Love Spent, etc. With Rebel Heart, it might have been my top 5 if Avicii had produced the whole thing, I only listen to demos.