I run NK 28's at a down-speed of 2.2 to 3 mph. The speed range allows me to run stingers in the stingray size. at the same time (for the most part). I always have NKs in the water.
My favorite colors/patterns:
Black, green/glow strip with a white back
White, blue/pearl strip with a white back
George Bush Pattern with a white back
I am not saying I do not have other patterns and colors but I start with these in the am and adjust as the sun comes up and as I lower or raise the range of depth I am fishing (due to the difference in light penetration). I always have one of the three mentioned in the water.
As a side note, the older NK blanks are what you want; the newer ones are NOT the same weight and do not run the same next to the older ones.