For me, I like the way no MC face. It will provide more immersion for player to the story. you can feel that you are playing yourself and it suitable for choice-base story game
I suggest you should try game
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for example, It has very good story and the way they hide MC face help player feel immersed in to they game.
In the other hand, showing MC face is can be effective too but it difficult for beginner because you must match MC face with his personality and expression, if not , the game will feel weird or awkward.This way is suitable for sandbox-base game.A good example of devs who use this way are
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and
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.
If you really planning to put 12-13 girls character in to your game, I suggest with showing MC face and do sandbox game