Turtle Power, Powder!
Seriously, I love "Turtle Power"...when it comes on shuffle on my iPod I let it play...it's great and brings me back to my younger days when I would watch the movie and let the credits play while I danced to "Turtle Power" and "9.95".
I liked TMNT II's concert madness when I was younger of course, but these days the worst part of that movie for me is Vanilla Ice, his "Ninja Rap", and the subsequent sorry excuse for a battle. I'm just not a fan.