I don't have any gray. Not that I don't like it; it just seems rare.
I have way too much green, fallout from a green quilt my MIL asked me to make for her. Unfortunately, most of the green fabrics for sale at that time were in the olive family, and she was buying the fabric, so now I have a TON of olive-shaded greens. Ick.
I also have way too much brown; same reason, same person.