The brown is a cashmere variation, while below it is an experiment with the cameo stitch. The Rhodes hearts were just for fun.
The yellow stitches in this photo are, I believe, burden stitches. The green is done in Alicia lace variation and the brown is diagonal mosaic. The orange stitches are upright cross, staggered cross stitch, diagonal mosaic, and slashed cross stitch.
Sometimes it's just fun to experiment and pull out colors and threads that you wouldn't necessarily use on a more serious project.