WELL DONE PEOPLE, The PS3 Trophy list actually has some of our suggestions! Not including the story ones, Here's what was mentioned:
by Ash735 (Me

)
"Let me get my camera" (Get LeChuck to pose)
became
"Ride 'Em, Pirate" (Made LeChuck do something embarassing on the cliff)
"Meet Murray" (Use Murray with everyone.)
became
"Meet Murray" (Introduced Murray to everyone) ...hold on
"BANANG!" (Do the Banang Dance!)
became
"Dance, Monkey, Dance!" (Did the dance of the hybrid fruit)
by Laserschwert
"There's a monkey in my pocket..." (getting Guybrush to sing)
became
"Musical Memories" (Enticed Guybrush to indulge his musical impulses)
"That's the main mast!" (annoying Morgan)
became
"She's Cute When She's Angry" (Get Morgan angry by repeatedly checking out the mast)
"Literate" (reading all the book titles at the Voodoo Lady's shack)
became
"This Ain't a Library" (Intensely browsed a prominent bookshelf)
by prizna
"there should be one for getting all 100,000 grubs"
Sort of became
"The 0.01 Percent Solution" (Got one one ten thousandth of the way through the alternate solution to the Cochlea puzzle)
Thanks TellTale