AO3 filters are incredible. The show ended over a decade ago but you’re only getting around to watching it now, and you want to avoid spoilers for later seasons? No worries; you can filter out anything posted/updated after a given air date. Don’t want to see crossovers? Guess what – you don’t have to. Three clicks is all it takes to make them go away. ONLY want crossovers? They’ve got that option, too. In a hurry and only have a few minutes to read? Filter out everything over whatever word count you consider to be “too long.” Absolutely can’t stand this one character/trope/relationship? Exclude, exclude, exclude. And all they ask in return is that you tag your stuff properly. Incredible.