The categories:
Best player: Jazznation
Admittedly, I've not been in the game to watch this, but from reports and from my reconstructed idea of how things went based on the map, Jazz has played superbly.
Runner up nomination: Mgoblue201
Most underrated player: Roboleon
The guy got given a sub-3 ranking at the end of the last game, meaning we think he's worse than the average new player. Really, guys, really? His PLC is absolutely monstrous and he's in strong contention to be called the strongest player this game. Do not see how you could vote anyone else.
Runner up nomination: Haly
Most overrated player: Colkate
Conversely, at the end of the last session, this guy got the top rating we gave out, was judged to be the best player going and the guy likely to dominate any future alliance blocs... and he goes and implodes by making one of the most rookie errors available to an EU4 player. Obviously still one of the best players, and does a mean Russia, but you can't not win this award after a collapse that hilarious.
Runner up nomination: Crab
Biggest flameout: Colkate
That Morocco implosion was incredible. So many rebels! I had a tough choice between this and Burgundy; but what settled it was the matter of the implosion. King went down to a fairly obscure mechanic that you wouldn't expect players to run into often, Fitz went down to Conquering 101: know thine limits.
Runner up nomination: KingSnake
Most peaceful player : Kabouter
Dude runs off to the other side of the world to avoid confrontation and played an entire session as a colonial nation a.k.a. most boring thing ever. Mind you, it's good for all of us because otherwise we'd get rolled under the forces of Gelre.
Most Morfeo-style peaceful player (aka most aggressive player): Uzzy
Every single one of his AARs ends with like a zillion new provinces being taken. He was so aggressive he got coalitioned to near death in the second session, and so aggressive that he came back from that successfully! Jazznation might display controlled aggression, fanboi might display treachery, but Uzzy embodies the spirit of the Khan: fuck you, that province is mine.
Runner up nomination: fanboi
Best diplomacy: fanboi
fanboi, how on earth do you persuade-people to trust you still after all the backstabbing and conniving? It perpetually continues to amaze me that people follow you into battle as an ally despite the fact they'll follow you out as a corpse. Truly, unrivalled powers of persuasion.
Runner up nomination: Jazznation
Most ridiculous reason for missing a session: fanboi
The mysterious incident of the Swedish train.