Well I would like to be a gargantua, but fate has decided I must be a cockroach 
why you WHOULDN’t be the gman?
Because the vortigaunts can shoot fucking lightning out their hands.
g man can briefcase the shit out of everything ,and adjust his tie with the accuracy of gods , also , we have no deea what he can really do…
it’s slightly possible that he can shoot lighting out of his urethra
I think it’s pretty obvious everyone on this forum would be Mr. Friendly.
I’d be Gordon because he is going to kick the Gman’s ass. Just watch.
Gordan fighting the G-man in a boss battle…THAT WOULD BE EPIC!!! but in order to do that, they’d have to explain his identity and motive first. Maybe in half-life 3…?
You never know 
A Headcrab. NOMNOMNOM HUMAN HEAD NOMNOM
dude, i wanna be that Blast Pit tentacle thing. fuckin badass
npc_citizen_026
It is my belief that npc_citizen_026 is a splendid fellow. He has some quite exemplary traits, and has a marked lack of fear when it comes to outrageous situations.
i think npc_citizen_026 is a pretty cool guy eh blends in with the crowd and doesnt afraid of anything
Strider.
I’d have a 20-foot dick that pissed pulse rounds and jizzed paradoxically physics-warping laser beams.
Hunter. I make very cool noises
Come on, who doesn’t like the Hound Eye? They are so awesome!
I always imagine that the stripes on there backs glow gently, and change with their mood.
The Hunter.
Gordon Frohman.
Haha he uses cheats. /gg
Well, i wouldnt want to be a bullsquid, my mouth would taste bad.
Maybe The boss at the end of Opposing force. Or a Manta ray. Or an Itchysaur.
I’d be this sexy beast:
THAT FUCKING METRO COP. SHIT, HE JUST BEATS THE SHIT OUTTA EVERYTHING, HOW FUCKING AWSOME IS THAT!