Perfect Symmetry

You are master of the symmetrical. You present a perfectly symmetrical image at all times, and you have found within symmetry a level of balance and efficiency that few others can match. Not only do you have the symmetrical facial features that sculptors and artists dream of, but you take care to ensure symmetry in your outfit's appearance, as well as how you wield your weapon/s and fight too.

> Symmetrical Ability Score Improvement:
You gain 1 point in the Ability Score of your choice but, only if you then also add an additional point into the Ability Score opposite the one you choose on your Character Sheet's list.
For example, if your character sheet reads:
  Strength
  Dexterity
  Constitution
  Intelligence
  Wisdom
  Charisma
Then adding a point into Strength means your other point must go into Charisma. Adding a point into Wisdom means your other point must go into Dexterity. And adding a point into Constitution means your other point must go into Intelligence.
If your Ability Score List is structured differently, you must follow this positional based logic for applying the points regardless of which Ability Score is opposite which.

> Ambidextrous:
You gain the ability to do with your off-hand whatever you can do with your main hand.
However, this feat does not give you the benefits of the Dual Wielder feat or Two Weapon Fighting Style.
You also become able to use both of your feet, arms, legs, and any and all other symmetrical appendages on your body equally well to their symmetrical partner.

> Symmetrical Advantage:
As long as you maintain a symmetrical pose when attacking, your weapon attacks gain advantage.
This does not have to be via two weapon fighting, as if you hold one weapon perfectly centre in front of you then that can produce a symmetrical pose as well (for example).

> Asymmetrical Disadvantage:
If your expression, appearance, outfit, weapon, hair (if applicable), or pose is not symmetrical when attacking, your weapon attacks have disadvantage.

> Symmetrical Obsession:
If there is an enemy that is also perfectly symmetrical in appearance, you must target them first in combat.
Was it jealousy or admiration that drove you to do what you did?
If there is an enemy that is particularly more asymmetrical than usual, you must spend half of your first turn's movement moving as far away from them as possible (within reason).
Some things in this world go beyond what someone like you would call unnatural.

Regarding obtaining this feat at Level 11:
You may only gain this feat at Level 11 if you do not include the little horizontal lines on your number 1s.
Each 1 your character would write must be perfectly symmetrical to the other.
The number 8 does not have this problem and therefore you can always obtain this feat at Level 8 should you choose to do so.