Guild Wars 2

You’ll need an open character slot.

Start a new toon for each profession. Except for Ranger, all have unique starter gear, for example the necro has a choice in the character creator section to select three different headgear pieces the demon eyes, the skeleton face and the ghostly eyes. Each one of these will unlock on your account to allow all of light armor professions to use these in their overall armor appearance.

Also note that during leveling the toon to the level 10 personal story there are three armor skins for Chest, Leggings, and Boots.

So if you have a Key Farming character slot the best way to do this is to select human and do all the unlocks on each profession till you have all starter skins unlocked and delete the toon and start another for each piece and profession.

You can skip the warrior too, their starting armors aren’t unique to character creation and can be acquired as drops.

Something worth mentioning is that the Studded Mask and Studded Shoulders are currently only available as personal story rewards (level 14 and level 22 stories respectively) for Adventurer professions.

Dulfy’s great guide may help in collecting those skins you want:

http://dulfy.net/2014/04/17/gw2-fashion-collector-title-guide/