Ionian (Happy, bright) Dorian (Melancholic but hopeful) Phrygian (Very dark, exotic minor) Lydian (Dreamy, floating) Mixolydian (Bluesy, upbeat) Aeolian (Classic sad minor) Locrian (Tense, unresolved)

Diatonic (In-key chords) Chromatic (Adds tension) Borrowed Chords Quartal (Spaced in 4ths) Extended (7ths, 9ths, 11ths) Mixmode