Inglorious Bosh'tets/Funny

From the sequel, Harbinger's first appearance on the derelict Collector ship:

"MISS ME?"
Shepard groaned. "Not this again..."
"ROSES ARE RED, VIOLETS ARE BLUE, WE ARE HARBINGER, AND THIS HURTS YOU."
"SUBMIT SHEPARD! MY CONTINUED VERBAL ONSLAUGHT WILL TEAR YOUR SELF-ESTEEM APART

From the third one, "Blood and Plutonium". Harbinger and the Reapers glassing Pluto after mistaking it for Earth.

Harbinger: (to the other Reapers) THIS WAS JUST A WARM UP, ALRIGHT?

Also from the third one: The Alliance Defense Commitee turning Obstructive Bureacrat into an art form.