Bottom line is you have to find the draw weight that is comfortable for you. Currently, I shoot at 60 lbs. I used to shoot at about 66 or so, but now I take into account how much harder it can be to draw a bow back when it is cold, you've been in the stand for a few hours, and you are bundled up against the elements.

One bit of advice: don't crank up the bow just to shoot more weight. Again, it has to be comfortable to draw under all conditions, not just when at an indoor range wearing a teeshirt. Also, I believe each additional pound at that weight will give you an additional 2 feet per second, or something like that. So adding a lot of additional draw weight is going to add very little advantage. If you are hunting out West, and 50 yard shots may be common, then having a few extra pounds might matter. But if most of your shots are 30 yards and in, 60 lbs. on a modern compound is plenty.