I suspect a lot of players miss Cherry altogether on their first playthroughs, since you basically have to pick between her and Alison early on. With Alison being introduced as an old friend of Ian's while Cherry is a total stranger, naturally most are going to be more curious about Alison. It was so for me, too. It's was only by doing multiple playthroughs that I came to know Cherry and found her be a lot nicer and more interesting than in that first playthrough. That's my explanation for why she's so far down the rankings, anyway.