Aesthetically, I would say that Jungle is the best, although it is presumably practical as well. As a builder, I like jungle grass’ vibrant color better than most others, although it doesn’t really fit the theme of my current island.
Following jungle I’d say that the plains is second best for a standard color and there’s no problems with growing plants there, etc.
I’d say icy biomes are not ideal, because working with water for cobble gens or anything else gets pretty annoying pretty fast.