I have thought about my suggestion with the cursed mask and having 2 personalities at once:
My answer: The mask is not neccessary at all.
Regarding choices, you can :
- chose between 2 good options (I want this sword or 2000 gold as reward)
- chose between 2 bad options (take the corridor full of enemies or the corridor full of traps)
- chose between god and bad (kill the prisoner or rescue him)
- do something more complex (Each option will have different positive and negative consequences at the same time. No option will have only good or only bad rersults.)
- A combination of the things above.
If you have good writers the mask is not neccessary to create interesting choices. But such a mask could be one of the better reasons to have an interesting choice.
These thoughts have convinced me that the mask will be a fun item in any case. It will ruin what I have called "serious role playing" in any case. If you accept this you can do some really funny stuff with the mask. Fun is the most importand thing in a game and different people have different ideas of fun.
Well, if you are really good you might create a shape shifting mask that makes sense in the game world. I am not a game designer after all.

Prof. Dr. Dr. Mad S. Tist

World leading expert of artificial stupidity.
Because there are too many people who work on artificial intelligence already