I'll start off, since I didn't want to spoiler-cut (too lazy). The biggest one I really enjoy is when Will is stabbed and Jack immediately looks horrified. There's no reaction to anyone else on that ship, except for Will and Davy, in his immediate field of vision. And when he gets back to the Pearl and prepares to stand against the Fleet - Jack wasn't that angry when he shot Barbossa. (And who can miss how happy he was to see Will hale and hearty at the helm of the Dutchman?) I really hate the fact they didn't have a proper parting ... though I guess maybe the fact they didn't have to say goodbye leaves it open for future meetings? *dreamy*