A few of my favorites:
"how was that smooth?"
"Nothing bad can happen on a green colored coaster!"
"This ride is officially dubbed "sex drug" by TPR"
"This better have awesomeness attatched to it!"
"I'm sorry I can never equal up to Wild Train"
Anything said in the Manhattan Express POV
"Come on Takabisha, don't be a little bitch"
"if it had 87 more inversions, it'd be the Smiler"