I do not read mobile, I have hundreds of books (somewhere around 300) currently, they live at my Grandmothers house because that is where there's space for them. A select few, however live in my bedside table, including... Hold on let me dig... Ah, there it is...

I'd love to know how old my copy is, seeing the year of print always excites me, but unfortunately it doesn't say the year of print anywhere, at least not in a way that I can recognize. I stick with print books mostly for this reason...

The notations I find are like treasure for me. A window into the lives of people from the past, gives me a feeling I couldn't possibly describe (also the smell), but I digress..

I do not personally feel like Miltons works could have used a dash of Shakespearian humor, or any other. I feel that they are so profound because they have that uninterrupted seance of gravity to them.

As you said, Shakespeare wrote for the stage, his goal was to encompass the whole spectrum of human emotion in a single piece and while that served him and his readers quite well sometimes life feels a bit more like Milton than Shakespeare.

Sometimes a certain depth needs to be probed and explored as it is without the interjection of humor to reduce its weight to appeal to at the time, "common folk" en masse.