My rough scheme is 5s are absolute favourites, 4.5s are beloved, 4s are great games that I'm fond of and broadly recommend or have great memories of, 3s and 3.5s are all round good games, 2.5s I like but might not be in a hurry to play again, 2s have something to like but are flawed, and below that are games that I just don't like much.