I used to use Cheap Joe's "piggyback" palette, which holds a lot of colors--upward of 32, I think--and has a 15-well palette (which you can buy separately) that fits into a space on the palette's lid.
It was the heyday of my discovery of Daniel Smith, and I used the piggyback to squeeze out my new colors to try.
Turns out I rarely used these, but I'm going to set them out to encourage myself to try/use them. Especially the quinacridones (top left).
One I do consistently use, though these aren't all Daniel Smith colors--the hematite, which I love, is DS--is my neutrals palette, which, in addition to the colors you might expect has Joe Z's gray (or is it black?) and two colors I was introduced to in a Carol Carter workshop--in person! Shout-out to Rhonda!-- shadow violet and shadow green.
I can't resist a color with the word "blue" in it and I like the two blues above. But, I don't know why, they're "soapy," which is unpleasant.
Love how the shadow violet separates into red and blue. I wonder why the green doesn't separate-- how disappointing!
Raw umber violet surprised me: I didn't expect the color to be so pretty!
Venetian red and Minnesota pipestone I can do without; never attracted to the warm muddy reds, but perhaps that's because I live at the shore, where such colors arent prominent.