I'm doing FOOTLOOSE now. I love the opening! I think many of the songs are weak when compared to how they were originally performed on the movie's soundtrack, but this one definately sets the mood for the show. You have some high-energy dancing, and then you're quickly thrust into the choir-music style that Ren and his mom have to get accustomed to. In a way, it takes the audience with Ren as he moves from the big city to a small town. We, too must make the transition from the rock music we love, to the church music we might not love, but we don't really have a choice either way.
But I'm playing Rev. Moore. Maybe I'm biased because I really like my intro in the show.
Enough about FOOTLOOSE. My pick for worst opening goes to..."In" from CARRIE. I love the song to death (I love listening to the show, period) but I hate the choreography. It's too much for the singers/dancers to handle at once. You can hear their voices shaking while they try to keep up with the dances. I blame the show's failure on Debbie Allen. None of the dances were right for the scenes they were in, and I won't forgive her for what she did to the prom scene (song "Wotta Night!"). If the sets (or lack of sets) and costumes had been even remotely close to good, her dances still would have kept the show in the "laughable" range of things.
Best: The "Bobby" chant from COMPANY. I haven't seen the current production, but I love it on the cast abum. If you want to be picky, then "Company" is the actual opening number of COMPANY, and it's even more enjoyable than the "Bobby" chant, though I love both. It does a wonderful job of getting the point across that Robert is swarmed by these friends of his, as well as his girlfriends, and (when sung properly) you can tell right away that Robert has gone through this enough times before that he might just be numb to it all by now.
-- SDG