The Surplus (AH) rules.
The new damage changes to weapons, despite the bitching you'll see from people who think loot that isn't all the same is a bad thing, is awesome. My blue Polarity Gun rules now, and the bug with the repair cost being driven up is already fixed so I didn't experience that shocker.
The Christmas hat is pointless but cool, like all holiday stuff in these games.
The re-spec that came in the patch afforded me some points back from Leech Gun to pump Firearms and Polarity Gun up to 5 each... I rule. I miss decay though... going to have to maybe put a pump into that.
Portable wormholes (Town Portals a la Diablo) are awesome, only further cutting down travel time. Just make sure you're safe when you go to use one, and they don't work in instances to get you out and back to a base.
Oh, and did I mention the Surplus rules? FINALLY the game has an economy of sorts. Can't wait until more rare and special items are added. :)
More on all this tomorrow probably.