Woahhh that's a lot of books!! and here I thought I have so much books that I haven't even opened yet. XD Your books are so interesting and quite ironic that they are mostly about habits. Like mine too haha.
I'd say having these many books that you are planning to read is still a good thing even if they are there for years. They're not gonna expire anyway, so might as well have something ready when you're finally in the mood.
RE: Why do I keep buying more books?!