my favourite comment is where in the first level Lara comes by those funny spikey pole things, and Zip says in a whispered voice "its the centre of the evil coat rack empire!"
oh my god that was so funny.
also something ive noticed. in the manor, Lara sometimes talks to Zip when you walk up to him. mine once had:
LARA: Zip, how do you work out, i never actually see you leave this room
but in the movie where she brings Excalibur home, hes out of the room...
WTF?