That might be another thing people could like. I don't know.
Reminds me of If My Heart Had Wings xD
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I'm also a sucker for childhood friends, for reasons that pretty much agree with Clephas's listed pro's of them having an established relationship and good dynamics with the protagonist. It's always cute to see how these characters interact with each other.
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Edit: All the tsundere hate ;-; though I can understand if its towards the physical/vocally abusive type tsunderes. Those are the extreme ones. Like Lucia from Rewrite. Though at least in her route she ditches the violence and becomes alot more tolerable than she was in the common route.
The Tsundere characters I adore aren't as extreme; they include Kotori from KonoSora, Michiru from Grisaia no Kajitsu, Maki from LoveLive!, Kurisu from Steins;Gate, Mizuha from G-Senjou no Maou, etc...