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.
Never Live It Down: Pansy Parkinson's attempt to give Harry up to Voldemort has naturally haunted her every since. But it turns out she was already pregnant with Violet, and not quite thinking straight in her attempts to keep her unborn child safe. Harry knows why she did it, and he doesn't hold it against her.
Rescued from the Scrappy Heap: Chloe is pretty much set up as an intentional Scrappy, but she is redeemed in the later parts of the fic by turning her into The Atoner, and at the end having her make a Heroic Sacrifice. Which almost kills her, but though she survives she's drained of all her magic and essentially becomes a Squib. It's hard to hate her at all after that, especially when she takes it philosophically instead of growing bitter.
The Woobie: After the war, Hogwarts pretty much turned into a world of woobie.