Erm, keeping track of how far you are through an author’s works (I know a guy who did this to work through Michener’s entire catalogue over many years), seeing your reading taste evolve (I’ve been trying to read more non-fiction), graphing your reading over time (are you meeting your goals for yourself?) and thousands and thousands of other great reasons.
It’s not masturbatory to create goals for yourself, and lists are a great way to track those goals.
Having that data even allows future insight into things you haven’t even thought of yet.
