We potters can never quite seem to have enough time to experiment with glazes. Well, at least that's how I feel. When I was a painter, any color that I wanted could easily be mixed up. If I wanted a different shade, or a lighter hue, or even a darker value, it was easily accomplished within minutes. Sometimes the color that I wanted didn't work in a composition and I would have to keep searching, but the search was never a long one, at least compared to what happens in pottery.
Its a time issue. It takes at least a month's time to turn out test tiles of different color glazes, and then there is retesting to compensate for differences: firing temp, atmosphere, claybody, underglaze and stain, so on and so on.
So I have learned to be patient, or at least more pragmatic. I know that to get a good result in any glaze test requires planning and taking good notes. I still have a few commercial stand by colors on my shelves, but they are disappearing and I am moving more into the unknown. But I like the unexpected so I will follow these new directions and hopefully build on my positives.
Now, if I could only find my notebook......