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The survey then narrowed in on past and present “Harry Potter” fans (about 24%, or one in four survey-takers) about their reactions to recent controversies within the franchise — including author J.K. Rowling’s vocal opposition to a bill that would allow transgender individuals to legally change their gender in Scotland.

Of those who participated in Pottermania, 70% (or 18% of respondents overall) said they would still actively identify themselves as Harry Potter fans to this day.

Even still, 71% said they care less about Harry Potter now than they used to at the height of their fandom.
When asked to explain the dropoff:

• 42% said they’d reconsidered their relationship to the text after “learning about its more problematic elements”
• 35% objected to author J.K. Rowling’s recent anti-transgender rhetoric
• 36% also cited disinterest in newer franchise installments, like the “Fantastic Beasts” film series or the Broadway production of “Harry Potter and the Cursed Child”
• More than one in four (29%) simply “got too old for it”

Not surprisingly, certain “houses” – the in-universe Hogwarts dormitories that fans sorted themselves into based on their personality archetype – were more passionate about Potter than others. 

Those who self-identified as “brave” Gryffindors, among whose ranks included Harry Potter himself, were much more likely to identify themselves as active fans compared to the overall average (83% vs 70%).

Meanwhile, members of the stereotypically-villainous Slytherin house were far less interested in labels; one in four (24%) said they no longer call themselves HP fans at all, in fact, and half (52%) referred to the series as “problematic.”