#theres also an extra evil second type of reddit fandom where the subreddit turns hostile to newcomers after a show finishes airing

[prolibytherium]

Reddit fandoms trend towards being extremely stuck on character morality issues and will often disregard any degree of nuance in favor of labelling any bad person a sociopath incapable of human emotion. Reddit fandoms are often neutral-leaning-hostile towards 'shipping', and are often disinterested in melodrama and emotional nuances of their media to the point of outright denying or lamenting its existence. Reddit fandoms tend to be heavily dogmatic about canon as a concept and hostile towards interpretations of the source material that are anything less than explicitly spelled out as canonical, (with some exceptions for widely held pet fan theories)

Tumblr fandoms are less hung up on morality (outside of certain circumstances like when it can be used to label a blogging rival problematic, or when a character is a woman) and more willing to embrace nuance and grey morality, often to absurd ends where the worst guy on the planet is considered a soaking wet little kitten born in a cardboard box all alone. Tumblr fans will watch literally ANYTHING and interpret it as a romantic psychological drama-tragedy about queer suffering and yearning etc. Tumblr fans tend to be primarily interested in a version of their media that exists only in their own head, often to the point of being borderline unrecognizable as the source material.

tumblr fandoms and reddit fandoms are different in many ways but they share a commonality in many people having a dominating and singular focus on one very small aspect of the show (on tumblr it's almost invariably a ship, reddit tends to get more creative but is still often very obnoxious)