Homestuck is a very popular comic, it's relatively underground, but get anyone who is on the internet too much, and they'll likely know the name of this fascinating piece of media. It's a love or hate comic. It's length, complexity and absurdity can turn people off from it, though I have a lot of love and positivity about this comic. Roughly 8k panels long, it has little interactive games, and videos sprinkled into it, making for a nice breather after reading so much and for so long.
While the comic takes time to set things up, once the ball gets rolling, it does NOT stop. It goes HARD, and it either gets GREAT or you hate it. Though Act 5, where the Trolls appear, is unanimously agreed to be the best part of the comic, to the point people tell others to skip just for them. However, this irks me a good bit, and I dislike that mentality. By skipping to the 'juiciest bits,' you end up losing a LOT of context that explains the general plot of the story...