Gavin tends to avoid drinking when he can. He's seen alcohol destroy too many people to fall into the same trap. Not that he doesn't have his vices and terrible coping mechanisms, he just picks different poisons.

But more importantly, mother fucking Mars.

"No... no, I'm not. No Mars colonies, or moon colonies. Just Earth. I'm from Detroit. Do people still... live there? On Earth, I mean, not in Detroit," Sure, they were destroying the Earth, they had been for eons now, but Gavin still couldn't really imagine a society of people anywhere else.