In defense of Les Miz:
It is a well-crafted epic piece of theatre, a Romantic musical with a capital R, and everything about it was done expertly. The first notes of the overture blasting out of the orchestra like the voice of God, the roundabout and sets expertly used to create the sweep and feel of a true epic onstage, it was a piece de theatre that worked, seamless, from end to end. The character lines worked wonderfully in just about every case (one could make a good argument that the Marius / Cosette relationship is too quick and perfunctory to really have the desired impact), particularly its interpretations of Valjean, Javert, and the previously minor character of Eponine - who, despite a billion screaming fangirls, is actually a role of some psychological depth, and "On My Own" is a wonderfully written soliloquy.
The great thing about Les Misérables is the intense theatricality of every moment. "Valjean's Soliloquy" and "Javert's Suicide," in beautiful point/counterpoint, are a great example of this; the thrilling and moving moment when Valjean decides to live is contrasted with the dark and entrancing moment when Javert decides to die. The depth of tragedy in the show is matched by the hope that it bears; the women who die for love, the men who die for their ideals, Valjean as a thief who becomes a man of true and unending compassion. The book of the musical catapults you through a story that took 1400 pages to tell in novel form (even if about 400 of those were Hugo going off on a tangent) in 3 hours, and it tells the story with meaning, nuance, and real characterization at every turn.
For my notes (slightly old) on the casts that I loved best, see the link below.
-Wayne
Les Misérables - Broadway 2001: A Tribute