Looking past the pretty looks and those tight catsuits was a women who could really act, and a character that was very engaging, and developed upon episode by episode. Without Seven VOY wouldn't be as cool as it now. Thanks to Seven, Janeway realized that Annorax was messing around with the timeline in Year of Hell
In short Seven saved and helped the VOY crew more times than I can count, and because of her the Borg episodes were twice as good. That's about the highest praise I can give.