I usually use the Schmetz sharp (microtex?) needles for sewing batiks - they are finer and sharper. Larger needles tend to leave visible holes because the weave is very dense. The needle has to "punch" through it.
Sewing batiks (well, the punching issue because of the density of the fabric) also dulls the needle faster. During machine quilting, this can lead to skipped stitches and frayed/breaking thread much more quickly than sewing calico. Change your needle as soon as this starts, because it's not going to get any better! :roll:
I don't hand quilt batiks for the same reason I don't use sheets on the backs of hand quilted quilts - they are so densely woven that it's had to get good small stitches and it really dulls my needles fast.
But I do like batiks a LOT... I just budget for extra needles! LOL