Typically, with a series you love, you wish to be able to experience it for the first time again, usually because you miss that feeling it originally gave you. Something I realise more and more is that even though I know where the series is going, it always gives you that same feeling you had when you watched it for the first time. The start of the series (and honestly the series as a whole) is still able to give you this rush of warmth, happiness and carefreeness every single time you revisit it.
On a bit of a darker note, I have always appreciated how realistic this story stays in the portrayal of dealing with (childhood) trauma and abuse. It's not easily solved, you can't 'just move on' from it.
Of course, you have characters like Kaori, who at first push and push Kousei to get into playing the piano again, but will follow this up with a very mature approach; showing she is aware that Kousei is suffering, she knows it can be a lot. On top of that, even when Kousei tells her he's grateful she pushed him
''The dust is gone now... thanks to you. Do I look like I'm suffering? I can't fix that. This is going to be hard on me- that's just how it is. I'm sailing in uncharted waters, remember? Trying hard things, giving life to something. It hurts. But it's worth it. So... thank you. For shaking the dust off of me.''
It doesn't magically get rid of the trauma, it doesn't magically get rid of his struggles with the piano, his struggle to even hear the notes in the first place. But the support around him, his friends motivating and pushing him helps, and will slowly get him through the healing process. The series might be surrounding 14-year-olds, and they behave like 14-year-olds, don't get me wrong. But it doesn't make them incredibly naive, or overly mature. I think, personally, that it's a perfect balance.
''A famous violinist once said ''Music transcends words. By exchanging sounds, you can learn about each other. You come to understand each other as if your souls are being joined together. As if your hearts are intertwining. It's a conversation between instruments, a miracle brought to life by harmony. In that instant, music transcends words.''''