I go:
1. Hair, I'm not sure how but I can sort of guess how the rest of the girl is going to look like based on hair, because hair is easily the most common way to express oneself.
2. Face, and I do mean the whole face (eyes, lips, nose, cheeks, etc)
3. Shape of body (skinny, fat, possibly posture)
4. Breasts (no I'm serious, this comes 4th for me)
5. Legs