Her five closest friends must have it rough. If she only watches movies that the majority of them recommend, and never contributes her own unique movie-watching experiences for her friends' benefit, than she has established a "take... and take" relationship, a balance unfavorable to everyone but herself. If the rest of her social interactions are patterned the same way, then she is a social parasite.

Although, making movie recommendations may well just be a trivial aspect of being a friend. Far more important is if she comforts them when comfort is needed, recognizing her "altruistic" actions to be an investment to secure comfort for herself in the future. Unless she's too analytical to allow herself to feel negative emotions, rendering that service unnecessary.