Was it the Pizza?

Why does one person love a live concert performance that someone else hates? As a concert presenter for many years, I came up with "Judd's 4P Theory of Concert Experience": Four reasons we hate or love a performance. 1. Place - is the venue spectacular, or is the room too hot with hard-as-rocks seats? 2. Piece - do you cringe at yet another Pachelbel Canon, or just feel happy at any Hallelujah Chorus? 3. Performer - is it too ragged, rough or out of tune to take, or do you never fail to hear a special quality in this person or ensemble? (if you are related to the performer, skip to number four) 4. Pizza - (that is, the personal) - is the pizza you ate making you feel awful, did you just flunk your finals, or did you just hear the good news you were hoping for? Live performances are a synergistic subjective experience. And, by the way, so is the music lesson experience.