Here is a fun little necklace I just finished. The polymer beads are simple circles, with a design on one side, solid color on the other, then gently folded so they don't quite meet. This allows the colors from both sides to show and keeps open a channel for beading wire.
One experiment I tried for the patterned side was to shave slices off an extruded tube, place the strips side-by-side on a backing sheet, and then compress them in the pasta machine. I really liked the resulting inconsistent striped look.
Here is a closeup of one bead.