i think poppy cared deeply for others
i don't see how people can say poppy didn't care for others' feelings. sure, she joked around and flirted, but since when were those inherently bad things??? she never said a bad word about anyone. she gave scott many second chances--after he was racist toward the guys on the bikes (i personally would have dropped him as my driving instructor right then) and after he yelled at her. she treated the homeless guy like an actual human being (dangerous and naive as it may have been for her to approach him by herself). she constantly asked people what kind of day they were having. she could tell scott was troubled and she asked him about his life--his parents, whether or not he was bullied in school, if he was an only child. i think she was very kind to everyone, actually.
scott said she just needed to be adored, and maybe she did. but i don't see how that's bad. everyone needs to be adored, and poppy treated everyone like she adored them and wanted to be friends with them, so why shouldn't she hope for that in return?