It is far more pleasing to understand what is going on and be able to measure its progress then to be shown a series of arbitrary shapes and symbols that happen to push one's happy buttons.

Stop pandering to your users' mercurial, unpredictable, and manipulable feelings, and start using your software to teach their brains how it all works.

Plus, then I don't finish the interaction with, "well, what else have they deceived me on?"