Goodreads is only good (eh, decent?) as a database of books you've read. All the other functionality is pointless and or broken. The recommendation system is a joke and is obviously used to promote nonsense instead of giving you personalised recommendations.
I do the same with logging film watches on IMDb, which is actually useful because I can visualize exact watch behavior by the timestamps, and using exports I can also query my film history for personal recommendations (select documentaries that are horror tagged I've watched from the last 10 years).