"F1X TH1S"/Retcon has always been my favorite part of the comic. I remember reading it for the first time and having so much fun putting in all the passwords and seeing all the shenanigans play out. I feel like it is such a powerful moment, especially after "Game Over". I know a lot of people have mixed feelings about this part and aren't huge fans of the direction it took, which I can understand. But, I find myself rereading that part more often than others when I get the Homestuck itch. (I'm definitely not biased because I love Terezi so much)