No. No, no, no, no, no. No no no no.
No.
The reason I love Half-Life's story, as little as there is, is how open Gordon is to intepration. Is he doing this for the lolz? Is he begrudgingly being pulled into everything? Does he feel the Gman is good or bad? Maybe he actually agrees with Breen, thinking himself a monster? Every playthrough, I interpret what Gordon can be feeling differently, depending on how I'm feeling myself. Gordon spelling it out for us would be simply annoying to me. I wouldn't enjoy that part where the first game is kinda horror-ish if Gordon started gibbering to himself about how scared he is, or if he started pulling one-liners. Can you imagine the end of Episode 2 with Gordon talking? I can, and it could only turn out badly.
Is there space for a game with his type of plot with a talking protagonist? Hell yeah. But as I've always said, if you want to make that game, make a new IP. It's the same attitude I take to the new Fallout games: I love them, I just wish they hadn't come at the cost of traditional Fallout, they should've just been a new IP. If Valve wanted Gordon Talkman, just do some kind of parallel universe thing, or even just a similar game.
That said, if Gordon Freeman talked in future Half-Lifes, I wouldn't protest, because it'd mean the bloody things are coming out already. OK, who am I kidding, I'd ***** and moan, but at least not on release day.
Maybe on the evening of release day.