Well, here's the thing: according to the CurlChemist, polyquats don't cause build-up or any other troubles for curlies. However, some people, like kathymack, experience build-up that is very difficult to remove with a gentle shampoo. I'm one of these people. Basically I get massive build-up from polyquats which leaves my hair feeling weirdly coated. If I have used polyquats and my hair is wet, I can see frizz (and I am not frizz-prone at all). The only solution is using more agressive surfactants than I would like.

Kathymack is much better at explaining all this.
F - LP - HD - NE
Fine, low porosity, high density, normal elasticity
Hairtype 2c

Low poo: Petal Fresh Organics Rosemary & Mint Volumizing Shampoo
Protein: Colorful Neutral Protein Filler
Detangler/RO: KCKT (winter) or Curl Junkie Beauticurls Argan & Olive Oil (summer)
Styling: KCCC

Beauty Is Not a Number