I have to agree about The Lion King. I saw it on tour, and while Taymor's direction was excellent, and gthe performers were good, the score (other than the movie numbers) and book were crap.
But still, The Phantom of the Opera is the most overrated show.
I am a firm believer in serendipity- all the random pieces coming together in one wonderful moment, when suddenly you see what their purpose was all along.