[Frondo]

> Most users don't care about the alignment and spacing and so on in isolation, but they do get a sense of quality from the overall impact. This stuff really matters in aggregate.

Red Letter Media has a great phrase that rolls around in my head to describe situations like this (they use it for media analysis), "You might not recognize it, but your brain did."

Where you might not be able to point to a problem, but you instinctively know something is off.