A lot of what you might think you know about camo is wrong. Here's a webpage that will change the way you think about camo:
[url]www.whitetail.com/camo1.html[/url]
The most important thing is CONTRAST. Next is large shapes that won't fill in from a distance. In order for camo to work well, it has to work at distances between 20 feet and 200 yards, but when you buy it, you're less than 20" away, and in good (store) lighting. At that close distance, the little details are visible, and it looks ok. It won't work the same out in the real world.
Currently, the most effective pattern I've seen is the US Military 6-color desert. Lots of contrast, big shapes, and colors that work very well in nearly any environment. Woodland was designed for use in lush European forests, which are very, very green. It isn't great in most locations in the US, as it doesn't have enough contrast, and most wooded areas in the US are more sparse; less green.
I'd love to see a green woodland pattern on a tan/khaki/bone-colored background. THAT would be great camo!
-Troy