To sum up real quick, when you make your character in GW2 you answer a question about what type of person you are in regards to your profession.
Guardians choose a symbol of their dedication.
Warriors choose a type of helm.
Engineers choose a favorite tool.
Rangers choose their starter pet.
Thieves choose a mask that suits their style.
Elementalists choose an element they are most in tune with.
Mesmers (my guess) will choose their style of mask. Considering the Mesmer mask it quite iconic I feel it would be odd to be something else.
Necromancers mark their faces with their closest companion of death.
Most if not all of these choices will be very visual and I am not sure you can turn any of them off. I am not sure frankly if you should be able to turn them off, though it is pretty standard practice to have helm graphics be an option. But seeing as Theives and Warriors at the least have that as their visual mark, having that being able to just be turned off seems odd, especially considering if you choose Necro the choice is a very striking tatoo that covers your entire face.
I am curious as to what they all look like. I plan on going Visionary Scarf with the Guardian, but as far as I know there is no footage of the Guardians marks yet. It would probably be a bit overboard, but I keep thinking it should be a shinobi like scarf. Long and trailing. I think it would be epic. >_>
Still, what do you think about having a required mark? Great for story telling and to tell everyone you meet what type of person you are in your profession or do you think it should be a toggle in the ui because it can be a distracting visual que? As I said, not sure myself, but some of the Necromancer tatoos are VERY vivid so I think that might scare people off. It might be a draw to others. I am really not sure.
Also, if anyone has screens or vids of these marks in game I would love to seem them.