Replaying ME 3 and got to the Citadel again. I wish I saved it at the beginning so I could catch all the different one-liners (Yes, I know there's youtube, but I like hearing them in the game). I love my Piranha X and have used it to drop Brutes in about 10 seconds. I also felt a Really good about punching out a banshee. Not so scary with a fist between the eyes, is she?
I've been using the arena to test out new weapons and crew combos. One thing I love is getting all three of us with either Scorps or Falcons, all with cryo ammo. Lots of bad guys shatter with a BOOM!