Anton's Changing Ponytail with the expansion pack is probably the most versatile hair out there. I love it. I would also highly recommend Hmann's Cleo hair. His Total Hair package is just as good, but personally I'm less fond of that one: it's a little too complex (which could be a plus for someone else). The new Daz flat top hair style isn't the most versatile around, but it fits all of the P4 and DAZ figures easily, and so far I'm really pleased with that one. Mehndi's Ultra Salon hair is a absolutely amazing and easy to use, if less morphable than some of the others. Well, those would be my recs, anyhow. Though, as has already been said, Kozaburo's freebies are also some of the best out there.