Shattuck is a tangle pattern that I use frequently. It's one of the first official ones I learned and is very similar to the doodle that I've done for years as I talk on the phone. These tiles are all variations on the same Shattuck tangle. Since they don't have any other tangles they are all monotangles. I played with doing it in different strings along with variations in how curvy or how many lines I used.
Both of the two tiles above used a spiral string. I love how different they look simply by changing the number and spacing of the lines.