This looks so cool - taking a repeating wall stencil and painting with metallic paint. Adds such dimension and visual interest. I'd imagine you wouldn't want to do this to an entire room, but an accent wall would be so awesome.
High gloss pattern painted on top of matte wall - this is beautiful. I'm thinking about doing a few shades of blue matte and then some Van Gogh/Starry Night type swirls and brush strokes in gloss as an accent wall.