Before I made the mistake and started cutting my hair into shorter and shorter layers over time(you can't do that with wavy hair), I have to say that my hair looked the best when it was longer and cut into long layers with some random pieces cut shorter for a little more volume and curl definition. My boyfriend's sister, who is a 3B/C, has her hair cut the same way and it looks terrific. I definitely feel that longer is better, but a little bit of layer can go a long way to give your hair that extra oomph.
Formerly known as colomunky.