I don't think examples would be repetitive, I think they'd be counterproductive because the tastes of the audience are varied and that would confound the point

I don't think examples would be repetitive, I think they'd be counterproductive because the tastes of the audience are varied and that would confound the point of the categorization. To the extent that the examples have explanatory power, they'd be explaining the author's taste in art, which isn't relevant.