With some of the subtle ones, it's about the super or the combos. A yellowbelly is a prime example. On their own, they don't do anything for me and to the untrained eye, look normal. But think of the ivory they produce or some of the combos that involve them like the yellowbelly/pastel or the inferno. Vanillas are another. They kind of look like a light colored normal but the super is awesome and when combined with a fire, they produce the vanilla cream which is a fantastic combo. To me, I don't just look at the base morph I look at what it could when combined with other genes.