The thing I love most about Mondrian is: although he's best known for doing straight lines and blocks of primary colour, that signature design evolved BECAUSE he was an excellent artist.
The best exhibit I have ever seen was Mondrian's retrospective at MoMA, which was hung chronologically, so you get to see the development of his thinking and work until you get to the transcendent paintings toward the end.
It was one of his vermillion windmills in the Stedelijk in Amsterdam that first drew my attention to Mondrian's early work. It was incredible.
MoMA is one of the greatest galleries I have ever been to. If only I had been able to see that exhibit.
My knowledge of Art History is so bitty and perfunctory. I would love to learn more. Your Twitter feed is a regular source of interest. Recently devoured Gombrich's "Story of Art"