I just started using Natural Gear in their natural version for when I am stalking. Main reason is I never know what type of background I am going to find myself in and everything looks a little brown year round in western Oklahoma.
When sitting in a blind or tree stand, I prefer to use a ghillie suit in dark green, black and tan. This is mainly because I like to use cedar trees behind me to help break up my sillouette and the ghillie suit is awesome for this. Ghillie suits stink for stalking in my area though as there is a ton of cedar trees, briars and brush and the suit gets caught on everything.