I like charts, graphs, and diagrams because they make sense. Sure, your can skew them all sorts of ways, and sometimes they can get a bit out of hand, but they make sense.
Arrow going up? Great! Series of bars getting shorter? Not so good. Easy.
But I have to admit that Venn diagrams don’t do a lot for me. You’ve got one thing, and another thing, and then in the middle you get this football shaped combination of things that have things.
Still, Venns offer a certain graphic advantage that a line or bar graph can’t, like this cartoon that’s some sort of cutesy bear or mouse. Let’s see a pie chart do that!