I love to annotate, but a lot of my friends see it as "time consuming" or "ruining the book" or even "ruining the experience". I don't shed any doubt on any of these claims, as annotating a book is often for analytical purposes.

But, I want to assure you that by no means because you don't annotate do you not understand the book on the same level as these aesthetic book account owners do. In a world of hyper consumption and overwhelming sharing of content, it can be easy to compare something as personal as a reading experience to someone else's and feel lesser than for enjoying the same piece of content in a different way. From an annotation-lover... enjoy books as you always have, and never feel lesser because your reading experience doesn't look like someone else's.