Just to add to the chorus, Sunny Skin tone and Deep Prussian Blue are usually too gloopy to use so I end up mixing alternative colours.
Saying that a model shop near me has their Vallejo rack in the window. I've never purchased any from them as I'm sure the sun* beating down on them through the window must have an effect on the quality of the paint. Maybe its a storage issue with some paints.
*Sun = a big ball of fire in the sky which brings heat and happiness. Rarely seen in the UK these days, even less so in Shropshire.