I've got three patterns of camo, Weatherby Wool late season gray, Prarie Ghost 3D suit, and Predator Fall gray. I wear each according to climate and location I'm hunting (Eastern WA vs. Western WA).
I like the open patterns like ASAT, Predator, or Cabelas Outfitter pattern because they break up your outline better. The realtree patterns and other more detailed patterns look good up close, but take a look at them from a distance. You'll see they look very dark and you can see the outline very easy.
Now for hunting coyotes, I think it is more important to find a good stand location with good cover, enter your stand quietly and pay attention to wind direction. Once in your stand be still and quiet (except for calling). Look with your eyes, not your head. I think these are more important than camo.
Tim