And I love how much Jack influenced him into becoming a pirate. I always liked this scene:

JACK: For someone who has such a bleak outlook on pirates, you're well on your way to becoming one. You sprung a man from jail, you commandeered a ship and you're completely obsessed with treasure.
WILL: That is not true, I'm not obsessed with treasure.
JACK: Not all treasure is silver and gold, mate.