I do the arm-fold, the hand-gesture/finger-point, even the hand-clasp behind my back when waiting in line for something.
When I saw how my Shepard looked in the N7 hoodie, that's what convinced me to get a dark hoodie for a jacket. Unfortunately, it's not an N7 hoodie, but I can deal.
Definitely seeing the dialogue wheel in conversations, even interrupts.
One time my friend was feeling really down about something, and I went to comfort him.
No joke, as I put my hand on his shoulder, I heard the *ding* *choir "ahhh"...* from the Paragon interrupt.
If someone asks if I'm afraid, I respond with "I won't let fear compromise who I am."
And of course, the old standby...
"I should go."