My personal favourites are (all from Gimli, such a witty character);
FotR- "Not the beard!" -When Legolas grabs his beard to stop him from falling in Moria.
TT- "If we had time, I'd get this adjusted." *Chainmail drops to the floor* "It's a little tight across the chest" -Preparing for the Battle for Helms Deep.
RotK- "That still only counts as 1!" -After Legolas takes down the Oliphant
I would like to see what your personal favourite lines are from the trilogy.