Don't only discuss latest flavor of the month anime and actually discuss things made before 1990.
Don't use giant red text thumbnails declaring THE UNFATHOMABLE EINSTEINIAN GENIUS OF CRAYON SHIN-CHAN and actually keep a sense of proportion
Actually like otaku shit and don't perfomatively like half of the most popular shit while thinking the other half is evil
Are able to discuss stuff with lolis in without putting disclaimers in or making any jokes about FBI
Have non-ironic appreciation of pulp media that accepts and embraces it for what it is and its actual qualities
Don't have extremely American left political interpretations of things where they try to make every instance of crossdressing or gender bending in an anime into something supporting an extremely elaborate and American theory of non-binary representation
Don't tend to mention exterior politics at all, left or right, unless it's explicit in the plot of what they are talking about.
Don't constantly rant about Trump, Republicans, Democrats, blah blah.