I think you go nuts when you get older.
I don't think there is any question that Picasso is the greatest figure of the 20th century.
Picasso's sculpture has incredible strength combined with a lack of pomposity.
Making something good and saying something brilliant are not two things. When you make your own statement, there is a higher energy level, and you do better painting.
Pollock really invented something. No one painted like him - or de Kooning or Still.