With a pocket hole plug cutter you can better hide your pocket holes. Rather than depending on the limited selection of packaged plugs, you can cut plugs from the same material as your project; plus you can create plugs with a matching grain pattern.
WoodTek’s stainless steel plug cutter uses four flutes to make 3/8″ diameter plugs. To use the 3-1/16″ long plug cutter you need to create a simple 15° angle jig to hold the stock. Then you clamp the stock to the board and cut the plugs with the plug cutter chucked into your drill press. To release the plugs, run the stock through a bandsaw or saw them out by hand.
The Woodtek plug cutter will run you about $40 shipped. Trend also makes an alternative cutter, but I haven’t found any US retailers. Their version will run you 21 pounds ($35) plus whatever it costs to ship it across the pond.