Besides the appearance there's another benefit to flakes, they do cover a host of sins. If your floor is rough, and you don't want to, or can't, fully smooth it out, flakes will hide those imperfections. Another sin (to some) is dirt, and vast smooth monochromatic floor will show any and every spec of dirt, flakes will help mast the dirt. Finally over time you might drop or drag something that dings or scratches the coating, flakes will help mask them.
You don't need a lot of flakes to gain those benefits, even as little as 0.005 lbs per ft2 (that would be just 2.5 lbs for a 500 ft2 floor) will do the trick.
But if you like the look of a solid color floor, and they can look sharp, your vision trumps the look of flakes, so forgo them and enjoy!