As I begin to write this, (my own theory of human nature and its application to the golf swing), teaching pros all over the world are swearing they don't know me.
I think all of us has a natural rhythm. Some of us walk fast, some walk slowly. Some are patient and some are not.
I think until we learn to control our personal rhythm, most of us would find more success with either the longer clubs, which we tend to swing with a slightly slower rhythm, or the shorter clubs, which because of their slightly lighter feel and shorter shafts, we tend to swing with a faster tempo.
The difference might not be all that perceptible to us as we swing a club, but I believe it's there. What it boils down to is this. Way too many people have the same problem as you expressed, maybe with the irons instead of the woods, but they do. I don't know anyone who can claim they hit everything equally well.
So, if you hit your irons well, maybe you are a slightly faster person who doesn't deal well with the more upright posture and slightly slower tempo of swinging the woods. I am the opposite and always seem to hit my woods and long irons pretty well, but I when I swing hard with a middle iron or short iron, I tend to pull it a ton to the left.
Needless to say, the best cure is our teaching pro, but consider trying to duplicate your swing with every club in your bag. Do it on the range one day so it becomes a nicely repeated motion and see what happens. You can send me a check later...
