Hey Zed, your video a long time ago about not being a corporate programmer-serf is what inspired me to take up guitar, so appreciate that. What you said about chord substitution, do you mean some chords are more dissonant sounding compared to its major chord counterpart (e.g., dominant 7 or half-diminished)? So in scales, you have different scalar patterns that also have different qualities (e.g., minor pentatonic to the minor scale) - but how do you actually then use the scales creatively instead of just playing over the minor pentatonic scale to a blues jam because it's a stereotypical bluesy scale.