I loved Operation Overlord. Minus the shitty "Mako" sections, and the leadup to the end the end was worth it. Gave me a System Shock 2 vibe in addition to questioning Cerebus' experiments and "furthering humans and the war against humans in space."
I hope the choice I made (taking David from his brother and then pistol whipping him and saying "you come near him and this bullet is for you. The Illusive Man can fire me for all I care (which is hilarious in retrospect because I destroyed the Collector base before this so the Illusive Man is already pissed with me), but I'm taking him away from you and Cerebus.") comes into ME3.
I hope the choice I made (taking David from his brother and then pistol whipping him and saying "you come near him and this bullet is for you. The Illusive Man can fire me for all I care (which is hilarious in retrospect because I destroyed the Collector base before this so the Illusive Man is already pissed with me), but I'm taking him away from you and Cerebus.") comes into ME3.