Goodreads kerfluffle and decided you want off the site, here are a few of the alternatives for you. (Some of these I haven't used, but came across them while searching.) If you know of more, please suggest them in the comments and I'll add them in edits. Thanks!
PaperbackSwap.com (Yes, I know mostly for swapping, but they do have review systems and a community.)
If you just want to catalog your books, you can always look into Calibre.
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