My poor wife has had to follow me around dozens of times in dozens of environments taking pictures of me wearing different colors and patterns.

She agrees 100% that:

Woodland is by far the best in spring/summer
Multicam is best in fall/winter

This is an aggregate decision. Some patterns work better for highly specialized environments (e.g. some of the civilian tree patterns work really well if you stand next to a tree, but move into an open field and they fail).