Very very energetic. My eyes cant stop looking around it cause there's so much action. I love how each classes features are exaggerated like Demo's gaunty face and Soldier's yelling expression. Love it. Also love the color scheme. Makes it looks old and classic, just the kind of feel most TF2 tries to get across.
Only thing I would change about this is a more specific background. I mean it looks great as it is but it leaves me wondering whether they are in their base or outside. Maybe you intended to leave it a mystery but that's just my opinion. Also the height and physiques of the classes seem difficult to depict. Like, the Sniper look like he could be taller than the Heavy in this picture. But besides that its a fantastic drawing. I love crazy scenes like these! Splendid!
To everyone else seeing this, if you think this is unfair, that's your opinion. XD
What I see here: Scout: First time he's drunk anything stronger then Bonk! in large quantities. Spy: Handling it pretty well. Pyro: Unable to drink, unless he put it down his mask, he seems pretty much average. Sniper: "What did you put in this shit?" Demoman: Slap-happy. Medic: Might have had a bit too much. Emotional trigger there... Heavy: Has no idea what's going on. Soldier: Looks kinda drunk, but mainly pained since his arm is getting smashed by Heavy's in an arm wrestle. Engineer: Completely drunk. Just look at his face!
Oh dear god, the scope of these men's expressions are just too much to take. I've always wondered what goes on behind the scenes during the holidays in TF2- but I think this pretty much sums it all up. You use muted reds in this piece so well- must say it's a mite inspiring- it emulates the drunken warmth of the scenario. Your loose lines look excellent!
Also, Demoman's bottle should be considered a HAZMAT container. O the horror...