I didn't become a Kikka fan till she debut and I was livid when Aika got picked

(I was routing for Minami)
Honestly, looking back, I think it was because she was the ONLY one that got picked. I pegged her for getting chosen because Tsunku loves his works in progress, but I didn't expect her to be the only one (I think my list was Sumire Sato, Kikka, Minami, and Aika). And I still think that having just ONE other girl there would have actually made Aika more popular, thanks to the other girl being there and Aika could have flown under the radar for awhile.
Like, if the 10th gen auditions happened, and Masaki just got picked, there would suddenly be a ton of Masaki anti's, no doubt, because Ayumi (Or Sara) DIDN'T. So people who liked Ayumi would start hating on Masaki on principle. That's what happened to Aika. It was nothing she did, it was nothing about her, she was screwed the minute she was the only one picked.
EDIT: Changed the example to Masaki, who I think works better since she wasn't a popular choice during the auditions.