For me, I will always wash my hair in the shower. It takes nothing for me to remove hair wherever it is. I gotta clean that area anyways.
.
I always found it gross for people to wash hair in the sink and epecially disgusting when there rinsing out a perm in the sink. I always think that's dirt and chemicals in the same sink where many place dishes and clean there meats and such. Not in my sink. Ewww. I might as well drink dirty chemical water. Oops, I might be already doing that with dasani. (love dasani by the way)