I want to be, but after seeing the trailer I'm more likely to exit. (Yeah, I went there with another spelling and grammar pun, but see, by bringing attention to it, I'm being ironical and a douche.)
Basically, I saw the trailer and I didn't like it. I don't care who they get for the voice actor, we're carrying around a companion who talks to us all the damn time. Add to that that the game looks more like Half Life 2: Episode 2: Part 2: Star Wars 3: Rocky 5 and the big bad of the last one has been resurrected in the most annoying way possible and I really am rapidly losing all hope that Valve can make this thing appeal to me ever again.
Other ticks in the minus column include the plot now being fore-fronted, at the expense of it even making sense (I am aware that Valve could be pulling some sort of 'ha ha, all this outdoor running around was still just inside a testing area' but seriously that's fucking pushing it), and the addition of 6 new gadgets.
Puzzle gaming, in my honest opinion, should revolve around having one key to open all areas, as long as you can fit it into all the locks in a given room. The portal gun is one tool, which you have to use in increasingly complex and innovative ways in order to advance. Hand us seven and we just have a tool kit. Any one of those tools might potentially help, but how would we ever know? Trial and error, that's how, the absolute worst part of puzzle gaming I rather hoped we might have been growing out of.
Basically I think Portal 2 looks like a sequel. The same game with the addition of a companion who talks, a plotline recycled from another game, a villain recycled from the first, and the addition of some new gimmicks to keep us engaged.
Oh, and that thing you're carrying round looks like it's actually been designed to be an all-purpose meme-generator, which makes it officially the worst creation by a game-designer ever. Valve have failed me.