The word “distortion” sounds inherently bad. Even the definition of the word in the dictionary suggests it is some wrong version of something else:-P. But guitarists have been using it to create cool sounding electric tones for decades. So in the audio world, distortion can often add character and something interesting to your sound.
When mixing down your recordings, the use of subtle harmonic distortion (not the big fat distortion sound from guitar pedals) can lend some interesting character to your final audio.
Check out how you can benefit from harmonic distortion in this article from Audiofanzine: Click here for that post