Possibly The Least Motivating Speech Ever

Garrus: “Anything to say, Shepard?”
Shepard: “You all the know mission and what is at stake. I have come to trust all of… well, some of you… with my life. (Sorry, Jack; you’re a crazy bitch. I wouldn't trust you with my hamster.) I have heard murmurs of discontent. I share your concerns. We’re trained in a variety of combat disciplines; you guys would be legends, if I wasn’t so awesome. Glory for my teammates is not my way. Think of our hero; me. Lieutenant Shepard, who saved Elysium during the Scyllian Blitz. Or Commander Shepard, Spectre, who defeated Sovereign and saved the Citadel and the galaxy. The thought of me might not give you solace here, but I couldn’t have done it alone. Before the final battle, there were sidequests. Before I was a Spectre, I was a Marine. I saved Elysium; but before that, my Marines held the line. I destroyed Sovereign's base on Virmire, but before that, the Third Salarian STG Regiment and Kaidan Alenko held the line! I stopped Sovereign, but before that, the Council Fleet and the Alliance held the line! I will stop the Collectors, and in the battle today, you will hold the line!”
Jacob: “Wait a second. Your Marines suffered horrendous casualties on Elysium. The Salarians were almost wiped out, and Alenko died hugging a nuke. The Council Fleet was shattered, and the Alliance Fleet took a thrashing they still haven’t recovered from. I don’t like the way you’re painting this picture, Shepard.”
Shepard: “Welp, time to go. See you back at the Normandy!”
Jack: "Hold on! There's just that one platform here. We could all go with you, and the Collectors would have no way to follow you."
Shepard: "Hold the fucking line, dammit!!"
Mordin: "Should never have... mentioned Kirrahe. Tell nephew.... I held the line..."