Great and thorough review RCC!! Yes you apparently love Keratin. This is funny too because last time I did my K-pak treatment was not good. It was still during our high dews but my hair was all freaked out for days. That was going 2wks between treatments. I do get protein from other sources though and I've had bad reactions to Keratin in the past. So, I won't be trying this conditioner I don't necessarily think that you aren't Med Coarse because your hair likes Keratin. I use conditioners with mild proteins like Amino Acids and I use BRHG regularly. My hair is most definitely without a doubt Coarse and I don't have issues.
Discovered CG 2007

2C Fia BSL/Thick/Med-Coarse/Low(crown)-Normal Porosity Protein and Oil Sensitive

Link-Spritz & Condish Washing

I'm aCurlJunkieJunky

My hair LOVES Coconut DESPISES Soap Bars

CJRehab or H&B Fix, Deva NO POO, EO Rose & Cham POO & Condish, CJ CurlFix, CJ Pattern Pusha, CJ CIAB, SS FHG, KCCC, BRHG, AG Mousse Gel, ACV Rinses,Shikakai Conditioning Hair Rinse.