Harry Potter
It has taught me everything I know, along with my experience which it helped me make and handle. I've been revisiting the wizarding world much more often these days. Through the books, the movies, Pottermore, fanfiction, interviews and Merlin knows what else. But every time you read the books you learn something new, you learn how to handle life better. Every time I think about what's going on in my life I take inspiration from Harry or Sirius or Hermione or Albus or any other character depending on the situation. And they Always help, Always. Now J.K.Rowling has given us a new look into that world, again. I've been excited for the trailer of 'Fantastic Beasts and Where to Find Them' and I just watched it today, and it's left me pumped. Right now I'm watching an interview/conversation between Daniel Radcliffe and J.K.Rowling and am getting to know so many new things... Favorite thing she's said till now is that Albus Dumbledore has told her things she needed to hear when she was feeling... unbalanced. So he is now officially my adviser.
I love the marauders. They've done so much, they've indirectly taught us so much, even Pettigrew. And I cry every time I read particularly well-written fanfic. I'm going to be reading the series once again and cry my eyes out this time since I'm able to understand the characters much better now. Also her new writing on Pottermore is amazing! So I will read HP again, I will cry more, and I will learn more and I'll do it again and again, forever and Always. And I will watch FB even if I fail my pre-boards next year.
PS
JKR is queen. All characters are nothing but amazing. And the magic goes on on Pottermore, plus they're bringing the sorting hat and wands and potions back along with the new update, and that is life.