2016 reread. 
 [One note as I'm rereading these: JK Rowling is SO good at foreshadowing without you knowing that she's foreshadowing... And sometimes the foreshadowing is set up four books in advance of the pay off. It's brilliant). 
 I had forgotten large portions of this book (I had NO memory of Professor Lockhart, for example). This was one of my favorite HP books when I was a kid, but I didn't like it as much this time. It was heavy on characters that I don't particularly like (Moaning Myrtle, Dobby, Aragon). The bit with the giant talking spiders is just... odd. And this book still felt somewhat simplistic and innocent compared to the complexity and darkness that develops later in the series. 
 Nevertheless, it remains gripping, atmospheric, and morally rich. This book begins to deal with racism, eugenics, and the personal responsibility to choose to be good rather than evil. (There is a subtle moment in which Harry retries the Sorting Hat and forcefully declares "you're wrong!" when the hat suggests he would have done well in Slytherin.) Though Harry's struggle with his own darkness is clearly beginning (he is noticing for the first time just how much he has in common with Voldemort), this book remains on the more puerile side of the HP world.