I just did my first playthrough of the Citadel DLC last night (I'm on my second overall playthrough of ME3, after doing a playthrough right at launch and then moving on). I have to say, this was easily my second favorite ME DLC, right behind LotSB. The action was fantastic, but the humor... my god. I can't help but think that this is what I wanted ME3 to be. I think having all of ME3 focus on the grim realities of the war with the Reapers really hurt it a lot. I hope they can bring this tone back for the next game, whatever it ends up being about.
The moment with the Volus pizza guy was probably the funniest moment I've experienced in the whole series. The slow pan back as my crew is stuck in the storage vaults, and Shepard worries if she really sounds so whiny was probably the second funniest. And when my Renegade Shep got two dialogue options, one of which said "I will end you," and the other said "I will end you painfully," I was elated. I love those moments

And while there's so much there to love, the one last thing that had me smiling like a fool was listening to all the N7 conversations on the strip. Having played a ton of multiplayer, this stuff was fantastic. The woman who talks about how there's a whole defensible area, but her stupid team mates were just standing at the top of the ramp was hilarious. I just can't get over how well the whole DLC is done.
I guess there's not much of a question in there, but I really had to share... this DLC made me re-experience what made me a ME fan... it's something that, sadly, ME3's single player campaign never really made me feel (even though it's still a good game). So what did you guys think? Is the fun stuff what ME is really about, or do you think the overall tone of ME3 is where the series should go?