Is it personality? Character design? Maybe even a character's gimmick?
I think it's just the
moé. The vast majority of CG's are one dimensional and run off a personality gimmick or two. Let's take Shizuku Oikawa for example. Vastly popular CG character. Take away her huge boobs and cow craze. What is there left?
Sometimes a CG becomes popular, not because she's has a cool concept, but because she's been
unpopular for months or has the worst cards in the game. She just earns love for being the underdog. Mayu is popular because yandere are. Ranko is a chuunibyou. Nina is the loli-est of the loli. Etc, etc, etc.
Not to say they don't have interesting personalities... but for me it's purely the moé factor, rather than a deep introspection of character construction. And honestly, there's nothing wrong with that. I don't need massive character depth to like a CG... just enjoy her personality and antics. I'm not exposed to enough Ranko or Mayu, to become tired of their concept. Because they're so shallow (relatively speaking), I'm sure I could get tired of them if oversaturated... but in the controlled small doses that I get out of the CG franchise, it hasn't happened yet.
I never got into CG for an engaging intricate plotline… just cute idols, catchy songs, and adorable antics. I'm getting that... but there's certain types of these factors I'm wanting more than others, thus my bias for certain idols over others... and how I cast my vote during the elections.
EDIT: On a side note... is Cinderella Girls the largest potential harem ever? Producer-san has almost 200 after him.
