The Game Colour line is a duplicate of the Games Workshop line, so the line is a bit limited in range. The colours tend to be brighter than those in the Model Colour line (which tends more towards muted colours).
If you are painting historicals, the Model Colour will have colours that are very well suited for what you need.
Both lines will require quite a bit of shaking to mix, and you will probably want to drop bits of metal mini sprue into the bottle to help with agitation.
If you like dropper bottles, you also might want to consider the Reaper Master Series Paint line (or at least some colours from the line). The paints are organized into triads (usually a highlight, a midtone, and a shadow colour). The skin tones, the off whites, the bone/ivory triads, the browns, and the liners are particularly good colours to get. The Reaper MSPs require less shaking than the Vallejos (partly because they include an agitator already).
Derivan MiNiS paints are also very good dropper bottle paints. Much bigger bottle for about the same price as the Games Workshop paints. A smaller line, much like the Game Colours. Very matte paints, but they require considerable shaking (and benefit from an agitator). The Reds and Payne\'s Grey are particularly good.
In all likelihood, you will probably want to buy some paints from each line/set. I suggest avoiding a big purchase of any entire line.
