Yeah, I agree it's hard to categorize. Some would look at my hair and say 3a but it behaves like 2b and the canopy is so much straighter than the underneath layers.
My hair is a mix of 2b/3a and even a bit of 3b thrown in! I would call my hair wavycelli. It curls most when I leave it alone after wet scrunching. My hair has a spring factor of about 2 or 3 inches and has a very silky, medium texture.