I love batiks and probably use them more than any other fabric. They work well with most patterns, although if your pattern itself relies on color placement for the pattern to show correctly, you may want a more solid than multi colored batik to showcase the pattern properly. I love some of the traditional patterns done in batiks - it gives a modern twist to them.
As for care - from FQ to yardage I prewash using color catchers. When using precut strips, charms, etc. I do not prewash them. I usually throw a few color catchers in the wash with all of my quilts when they are done.