If I love a book, I will definitely keep it. Most likely, I will buy multiple copies signed, unsigned, paperback, hardcover, etc. if I really love it. If I just like it, I may or may not keep it depending on other factors like if it’s part of a series that I like a lot as a whole or if it is by one of my favorite authors. If I absolutely hate a book, I have no intention to keep it. I usually either put it up for trade, find someone to give it to, or very rarely put it up for giveaway.
Surprisingly, it wasn’t a review. A post I had written right after I watched Deathly Hallows Part II, “Coping with Post-Potter Stress Disorder” got the most comments this year. It also generated a lot of discussion with my readers. Potter fans for the win!