Somehow I think my hair would be an oily mess if I went without shampoo.. it usually is within 24 hours. But I suppose I'd have to train it after years of shampooing almost every day.

I think my hair is tangly because of the fine-ness in combination with the slight natural curl (not that you could tell because my hair's heavy enough to pull what curls I have out)... My Mom & sister have thicker coarser straight hair - neither of them have any problems with knotting, even when they had long hair... My bf also comments that a former gf of his that had long straight hair, never had knots, and couldn't manage to make her hair do anything, put it in a bun or whatever, because it would just fall down straight.

My sister's daughter has hair that's more similar to mine - she ends up with a lot of knots as well.

I generally have the beginnings of a mat/knot at the base of my neck, I try to undo it every day or so, but it always comes back.