GSP has lots of classic quotes:
"I am very glad you won that fight Matt, but I was not impressed by your performance, and I look forward to fight you in the near future."
After the Sherk fight: "...and now, everybody, I want you to listen to me. I'm going to go to my knees, like that, and ask the UFC, my next match, to give me a world title shot. Please! I want the belt so bad! Please, give it to me!"
"I knew I hurt him, because when I threw my first elbow... he said 'UUUGGH!'"
After his win to BJ (ufc 58: USA vs. Canada), the crowd was booing him, he got really upset and he said something like: "Listen to me everybody, I know the title of this UFC is Canada vs. USA but... there is no Canada and there is no USA, we are all one. I'm from Canada but I don't fight for Canada, I fight for me and I fight for the fans. They can be Canadian, American, Japanese, Chinese I don't care, I love them all equal."
After he won the title at UFC 65: "I come from far, I know I'm not from the US... but I'll do everything I can to keep this title in NORTH AMERICAN TERRITORY. Thank you ladies and gentlemen".
Talking about his first fight against Hughes: "I fought Hughes the first time, he beat me fair and square... Sorry fairly and squarely."