My daughter's hair is 4a, really thick and dense, yet extremely fine. And l-o-o-ng. Normal pigtails on her stop at her neck....but if you take her hair loose and stretch it, it's waist-length.
I've found out the following about her hair:
1) The wrong stuff tends to "sit" on her hair and cause greasy buildup. Even petrolatum- and mineral oil-free products.
2) The smaller the pigtails/twists/cornrows, the more unmanageable her hair will be when taken down.
3) Like others have said, that "snap-crackle-pop" if handled too roughly. Even though her hair is so thick, care must still be taken to handle it. The length makes it even more challenging.
"Nobody here but us chickens......"
"Chicken in the breadpan, kickin out dough..." *shrug*