Every book is a new journey to embark on. I mainly read romances, but I dabble in other genres too.
When it comes to reading physical books I prefer paperbacks, especially the mass market paperbacks. They're easier and more comfortable for me to hold. Hardcovers tend to make my hands ache after a while. (Maybe my small hands has something to do with it.)
Mass markets on my bookshelf
I also like how mass markets have nearly a uniform size. When I look at my shelf, it's just so pleasing to see them all lined up. They're also cheaper which is good for my wallet. On the downside they're made of a cheaper quality than trade paperbacks, but I don't mind.