These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Kimi ni Todoke
Base Breaker: Kurumi is either an irredeemably manipulative and nasty human being who doesn't deserve to breathe the same air as the rest of the cast, or a poor, heartbroken soul who, despite her ways early in the series, really needs a hug.
Three songs which share the same title with the series.
The theme song itself is pretty sweet and very catchy, but the full music video is what tops it.
The Seiyuu of the main cast did a cover of said theme. Something about hearing Sawako, Kazehaya and the others singing together just feels right.
The live action movie's theme song is pretty awesome as well.
The second season's ending theme is a very touching song to listen to
Ensemble Darkhorse - Try and find one fan who doesn't love Ryuu. Go on. Just try. It's probably going to take you a while.
A huge, huge amount of fans still reading the manga are only keeping up with it for the supporting couples (namely Ryu/Chizu and Ayane/Pin, although there are a few rooting for other pairings as well).
Fan-Preferred Couple: A lot of fans still ship Ayane/Pin over Ayane/ Kent, even though the latter ship is the one currently sailing. Ayane/ Kent still has a decent support base, though, and there's been a surprisingly small amount of Ship-to-Ship Combat or Die for Our Ship going on (for now, anyway).
And then, of course, we have the credits of the live action adaptation. Sawako and Kazehaya share a moment, Sawako's parents share a moment, Chizu and Ryu share a moment, and who does Ayane share a moment with? Kurumi.
Completely averted. Sawako is shown cooking and knitting presents for Christmas, is gentle and extremely, and we mean ''extremely'', shy, passive, and willing to be ordered around. And she never, except for her PE outfit, wears pants. Yet no Fan Dumb screaming that girlishness = lack of personality has shown itself, and the fandom proves that it can love a heroine as a "real woman", when the character is well-written.
Kazehaya even points out that it's somewhat unusual for Sawako to wear pants in Chapter 55.
Values Dissonance: When Ayane lets her older boyfriend know that she wants to break up with him he hits her. He does this hard enough to leave a mark, and she's seen wearing a bandage for a couple episodes too. After she explains how she got the bruise to her friends, the issue is never really talked about again, and more or less shrugged off.
Stoic Woobie: Ryu. He's been in love with a girl who doesn't return his feelings for pretty much his entire life, his eventual confession to said girl was rejected and his mother died in a tragic accident, but don't expect him to complain about it.