I kind of disagree with the idea that 7 of 9 was a breakout character. It seems that most breakout characters are those which the makers of the show didnt know would be so popular, its kind of a fun accident. I feel 7 of 9 was more designed to be a ratings booster. No matter what you think of her character, they got the most popular trek villain and turned it into a hot blonde woman wearing skin-tight clothing, then added in the whole Data/Spock/EMH theme of 'what does it mean to be human' that we all love. 7 of 9, in my opinion, wasnt really a breakout character, she was a ratings booster. I think thats something to be avoided, because it takes away from the other characters.