Oh gosh...
Seussical - it's just so fun!
Ragtime - amazing
Sweeney Todd - No explanation needed
Into the Woods - Same as above
Sunday in the Park with George - I don't know why I like it so much...
Jekyll and Hyde - It gives me chills
The Lion King - Downfall from there...
The Beauty and the Beast - Such a fun number!
A Chorus Line - Only if it's done right
Annie, Get Your Gun (Recent Revival) - Wow. I just love it!
CATS - Don't ask me why. Probably the only part I like in the show
The 25th Annual Putnam County Spelling Bee - Cute

I love the harmony
Chicago - It's just brilliant
Cabaret - Fun amazing opening!
Hairspray - Only if the cast is energetic
La Cage Aux Folles -

The tune's so catchy!
Oliver! - Same as above, and only if the cast is full of energy
Songs for a New World - Gosh, I can't explain the amazing-ness of this number!
Billy Elliot - Gives me chills just by thinking about it!
Evita - A very powerful number
Urinetown - I don't know why I like it... I just do
Gosh, I didn't know I loved so many opening numbers!
"Hey, you! You're the worst thing to happen to musical theatre since Andrew Lloyd Webber!"
-Family Guy