Haha, name Aeris "Yo Mama".
Later Cloud says something like "Yo Mama, Yo Mama!"

And Barret to Mr.T
Aeris(or Yo Mama): "Thank you Mr. Mr.T."

Aeris=bitch; right after you name her she says:
"I'm Bitch, the flower girl."

And this one is just funny overall--name Cloud 'Rupert'. ( "Be strong Rupert!" )

This name thing is very amusing. I once played the game and changed their name just to see what they would say. I'm going to do it again. This thread has inspired me.