So underrated and i never hear anyone talk about it ,  any metal gear online players @ vg ?.

I do, although Lor dof the Rings conquest may change that very soon...

LUL'Z LOTR
LUL'Z MGO

There are so many better MP games out there, why would you play this?

Lord of the Rings Conquest...I deem it as a MINI WoW for HD consoles. and MGO is tactical it deserves to be played by pros who can harness strategy such as my self. :P DONT JUDGE ME DAMNTI! O.o

i just started playing i'm struggling with the headshots i keep getting but it's fun as hell.

Please tell me you've played Star Wars Battlefront II. Please.

EDIT: OT: Played it for a while, pretty decent, got bored, went back to (pwnage) single player.

And I tried the LoTR Conquest demo too. It's pretty good, actually. Think Battlefront with Lord of the Rings classes. Then imagine it not sucking. Hard to imagine, I know.

I used to play MGO all the time for almost 3 months since MGS4 was released (Started with the beta). Headshots are quite easy, depends on the gun you're using, if you are more into an assault rifle like the M14, use the grip, it will increase your accuracy a lot.
I was a SVD player myself, virtually no-scoped everyone if they were close to mid-range away from me, and i had a HS accuracy of 89%, just take your time learning the recoil of the gun you're using, and how to properly line your shots.