I found the quote, "are exact measurements or proportions more important," interesting. I really find it difficult in design decided which is right. I really don't like the idea of exact measurements because I like to have it more free.
I enjoyed the part about simplicity and how powerful can be. Although I do love a design that shows a lot of intense color and structure, I really for the most part like things to be minimal.
It was really interesting seeing the tiling of images and paintings that are from past times, showing how things like the golden ratio have been around for so long.
I'm currently working on a project in Typography 2 which involves grids. I found it helpful to see all of these grids laid out, showing how similar and separate that grids can be.