Useless splotches.
Look, this is probably going to cause a bit of ill-feeling and get me into trouble, but I think doing large splotches as ink samples aren't useful. Surely just normal writing would be a far better way to judge an inks characteristics. I think large splatters are mis-leading.
Ohh! Look at the sheen/shimmer/shading in that huge blotch! Must get some of that!
Maybe if you're going to write with a paintbrush, a Q-tip, a pool cue or a 4.5mm stub, sure! But with normal (EF, F, M or B) nibs, it just doesn't show as much as in a large swab.
And this is coming from a person who loves his stubs and flex pens.
I just don't see the point.