I'm on GoodReads too. Keeping a list of books I finished helped me realize that my tastes had shifted. I'd struggled to finish things I thought I liked, but after a while I figured out that I just wanted lighter character based stories. Sci-fi if I can get it.
I do the challenge but don't stress about it. I read about 50 books a year, but mostly because I always read at bedtime. A little bit every night really adds up.