Lord Mhoram
Hero
You're never thinking as the character, though, this is impossible. If you're actually trying to play a character that isn't just a version of you, then you should constantly be having to consider actions from outside yourself. I understand the comfort of being solidly in the zone, but it's a mistake to suggest that this is really being in tune with a character not yourself instead of just you being immersed in the fiction. It's a myth used to discount play approaches.
I don't use it to discount play approaches, just as an approach on why I don't like certain play approaches. And every character has some element of me in them somewhere in personality - but when I am "in the zone" there are times I emotionally forget I am in the game and all I am thinking and feeling are what my character experiences. I don't forget that I am in the room with friends.. but that is almost a secondary thing going on.
I mostly was using that example, not as a way someone should play, but as a way that some do, and why those who play like me may not like personality or roleplaying mechanics.