Thick and long. Super thick, smooth hair gets me every time as soon as the length passes shoulder blades, but it really becomes a showstopper when it hits hip length (not waist length, think of the widest part of a woman's body) and longer.
I don't care about the color as long as it's all one length, thick and fluffy.
I've also always been into a full on bush, no trimming or shaping, just let it grow untamed, especially if it's thick and soft. This has over the past few years turned into an armpit thing now too. Think Noshavebabe, she was glorious. Nowadays a shaved underarm looks maimed and weird, and a bald or even over-shaped ladyfur patch is equally off putting to me. Thanks internet.