No. 2 looks almost cel-shaded... interesting. What kind of effect are you going for? In No's 1 and 3 there seems to be a problem with her eye direction. For that reason alone I'd say no. 2 or no. 5, depending on if you're going for realism, mood, whatever...

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"you are terrifying
and strange and beautiful
something not everyone knows how to love." - Warsan Shire