Honestly, I wasn't crazy about this song the first time I heard it, but it just kept getting better and better with every listen.  That soaring chorus is just goosebump-inducing.  
Best part is that I remember so many people insisting that Adele was going to be a one-album wonder, and that no one would be here for her when she came back.  GUESS WHO'S WRONG, BITCHES?!  
I'm so happy to call myself an Adele stan again.