One of my all time favorite! I've read the trilogy three times and certainly will read it again. I love the way Tolkien creates a whole universe, which is actually based on some real facts or beliefs, and makes you (at least me) feel that the various characters' feelings and desires.
In The Seven Basic Plots: Why We Tell Stories, Christopher Booker explains there are seven basic narrative frames upon which stories are based: "overcoming the monster", "rags to riches", "the quest", "voyage and return", "comedy", "tragedy" and "rebirth". The Lord of the Rings masterfully include six of these seven plots (there is little or no comedy).