Straight from the horses mouth.
Not… like Raminators a horse… or like horses can speak… but it’s there![/SIZE]
Personally I’m looking forward to Surface Tension the most.
Actually, just thinking about it is making me want to replay it… or maybe I should wait, since the mod might be releasing very soon. 
Damn.
People still visit this thread, so I’ll share what I’m eager to see.
Like a lot of people, I’m interested to see Inbound. I just remember when HL first came out and that scene in the beginning very simply but effectively introduced a new way of approaching FPS. It actually attempted to give an explainable context rather than to just blow stuff up! Nice to revisit that with a fresh look to it.
I sort of hope they add a few more details to make Gordon’s part in causing the RC a little more plausible. I never quite got how a guy with a PhD from MIT would be limited to do something that’s almost janitorial like “push this cart over there.” They may not add to that, but I can hope. How they do the scene shifts to Xen after the RC will be cool, too.
I sort of hope they make Power Up and On A Rail more enjoyable. For whatever reason, I never quite liked those levels. I know they’d mentioned in other areas of wanting to make certain levels flow better, and I hope that happens with those two.
The scenes between the end of Apprehension and Residue Processing. Simple cinematics, but just very cool and introduced a nice plot shift into the game.
The part towards the end of Surface Tension where you dropped down into the building covered with wall mines. When that’s revealed in the game, there’s always a part of me that thinks of the designers and goes, “You bastards . . .”
Beyond that, just hope the game runs well enough on my system. That reveal scene from the pipe in Surface Tension may murder my computer though.
The part where you come out of that pipe and those airplanes comes by “SWUUUUUUUSH” God, that was so intense!
Placing tripmines on scientists heads; those were the days
Ahaha, I still do that in Sven-Coop :x
The part during the RC when you first see Xen for a brief moment
The opening sequence of course. 
All of it. Damn.
Unleashing the Gluon Gun for the first time.
I can’t imagine why
I’m anxious to see that part where you’re in a vent and soldiers start shooting at the vent and…:awesome::awesome::awesome:
Oh, and Xen.
I want to see the first tentacle area. Especially when the guard yells at it and tries to shoot it.
I can’t wait to see the G-man’s speech. I’m wondering if they’re re-using the original sound files for that or if they have really good voice actors.(I heard that the gaurds in the trailer sound very similar to those in Half-Life.So somebody is bound to have the talent to mimic him.)I also wanna play around in the anomolous materials chapter with weapons killing everyone in sight…
I’m gonna have a ball kicking ass and chewing bubblegum (all without gum) in We’ve got Hostiles
As has been said many times before, the voice actors for the characters will be homebrews, not the Valve’s voice actors.
Ironically enough, it’s the same person.
Xen Xen Xen ! really can’t wait to see at least a pic of it