Definitely sulfates for me. Protein doesn't bother my hair at all. Nor do cones, but the harsh shampoo needed to remove some of them is what is damaging for my hair. Honestly I don't know about polyquats, I'm not sure if I've ever used a product that contained them.
Brooklyn, NY

Hair: 3A/B, Underlayer of 2B
HG products:
Winter- Giovanni Tea Tree (co-wash) & 50/50 (condish); Curl Junkie Curl Assurance Leave-In; Curls Milkshake & Quenched Curls; Re:coil; BRHG
Summer: DevaCurl No Poo & OneC; CK; Re:coil; BRHG; Honey!!!

fotki pw= crrrls