I absolutely love camouflage. It' s kind of a sickness with me. I' m always buying more camo and testing it in feild for hunting and tatical purposes. I currently own more than 20 different patterns. I' ve come up with a system that works great for me. I buy BDU style Pants on the large side so I can layer underneth for cold wheather. If avaible I buy a shell parka. If a shell parka is not avaible I buy two yards of material and have one made. This way I can change my pattern on my expensive parka to keep cost down. In warmer wheather I can wear it over a tee shirt or light coat.

It' s important to understand that everything with eyes does not see things the same. The questions of What, Where, When, and How must be answered before choosing the best pattern.

I' m assuming you are looking for camouflage for deer hunting. While any camo will work in specific circumstances. An example is if you hunt from a tree stand so high you nose starts to bleed, your birthday suit is suffecient. There are some that are more effective in a broader range. There is no one perfect camo for everything. If that were so, there would be only one manufacturer and one pattern! Many on this site have it figured out already that for deer hunting a light back ground, highly contrasted tones, and open pattern is best. ASAT and Predator' s Fall Gray and Fall Brown have already been mentioned. The other would be Sticks-N-Limbs. I own all three and they are extremely awsome. I do not hunt deer or similar game with any other camo. The results of three are absolutly unbelievable, Seeing is believing. I also mix tops and bottoms. Very seldom do I where the same pattern on top and bottom.
Some have mentioned Mossy Oak, Advantage, Real Tree, Trebark, and Etc. brands. These are good in their own right but, better suited for the likes of turkey, crow, and duck hunting. They tend to be pretty dark overall and don' t break up your outline that is needed for most deer hunting situations. In fact some are so dark now, I' m wondering how long before their new pattern is all black.
Some have mentioned ghilie suits. The ghilie suit was designed for hunting people. People see much differently than the animals we hunt. While they can be effective in some situations. There are some draw backs for ghilie suits. They can be heavy, hot, hold extra odor, and hard to move around in. Try stalking a deer while bowhunting thru some thick cover on a warm day. Not much fun I can attest to.