Computer Modern is okay on paper, but I find it very frustrating to read on screen. I wonder if the Fell types are similar ‐‐ the scan of the thesis, where the letters aren't fit to the pixel grid, looks a lot nicer.
I do like Baskerville, but I am a little sad that the only open source version I know of, Libre Baskerville, changes the design so much for the screen. Caslon is in the same boat.