Depends on the area I am hunting. I probably sound like a girl, but I am a fanatic about matching hunting gear. I really like the Mossy Oak patterns. I like the Realtree stuff as well. In the early bow season I usually wear mossy oak "obsession" as it has more green to it. Later in the year, usually mossy oak break up pattern or hardwoods pattern. This is all for when I bow hunt, which is about 80% of what I do.
If I am in a box stand and its really cold, I wear a pair of Carhart insulated bibs, and a camo jacket. Nothing fancy there. Half the time I wear jeans and a sweater and then a light camo jacket over it if its not too cold if I am rifle hunting. When I bow hunt though, I take it more serious and really plan out my clothes that Im going to wear.
I also have a Scentlok set of gear that is Brush pattern, it can blend almost anywhere, I really like it (but I only wear it to bowhunt).
Being a huge duck hunter nearly all of my duck hunting gear is Realtree advantage max 4-HD. I love it and it works well for the areas I duck hunt.