i've been using paulie's "you stupid jerk!" line a lot lately. there's a few others, i'm sure, but here's some off the top of my head:

i've been doing michael's frightening stare when i'm in a bad mood or serious, and talking as quietly as mike did at times when i'm ina serious mood

also, last week my housemates and i had a party, and at one point a friend of mine, a Sicilian and Godfather fan, showed up and in my drunkenness i grabbed his face and said "i know it was you, Fredo!" or something to that effect. he busted out laughing:)

oh, and last night i was playing guitar (again, drunk) for my drunk friends, and what did i break into? the Godfather theme! one of my friends loved it.