'Normal' books! Gotta have the 'feel' of paper, the turning of the page, the smell of mustiness if it hasn't been opened for a while! I enjoy just having a 'book' in my hands, whenever I want to read! Always have a book in boot of car, in case I forget to take one, when going for appointments!
I hate getting Library Books, where someone has turned down a page, as place marker! There are a trillion pieces of paper which can be used as a book mark! Train ticket, movie ticket, actual purchased one....the list is endless, but people continue to 'disrespect' books by turning page down. That's just plain LAZINESS! Any I come across, I press out. Gets rid of most of the fold crease!
Would not do 'electronic' as had to read multiple pages, many times daily, in my job. My eyes used to 'cry' having to do that!
I don't believe it's 'good' for our eyes' to look at computer screens' for lengthy times!