I realize I'm way late on this thread, but to me your hair is definitely 3a.
-3a/3b, fine, very thick, normal por., normal elast., long, dye- free (CG since Nov. '11)
-CO: every other night (air dry) Suave Nat. (usually strawberry)
-Low poo (As needed): Giovanni 50/50
-RO: GVP CB (experimenting with GVP The Detangler)
-LI: Giovanni DLI or a tiny bit of my co-wash or RO (sometimes none)
-Styling: BYZ Noodle Head Tame your Curls Mousse
-PT: ION Effective Care