If you really want to know, my ratings roughly translate to:
5 of 5: Amazing. Loved it. Involves an embarrassing amount of gushing and inappropriate, repeated recommendations to friends/strangers.
4 of 5: Really good and entertaining read, but I don't find myself thinking about it much a week later. Lacking something special.
3 of 5: An ok book, maybe not my thing. Decent plot/storyline but didn't really stand out.
2 of 5: Didn't care for it for whatever reason. Was boring or couldn't get over a particular aspect.
1 of 5: Really did not like it. Thinking about it evokes physical reactions of anger or disgust.