Two factors influence my decision on whether to use a driver or a 3-wood off the tee:
The length of the hole;
The level of difficulty of the tee shot, which might be determined by the hazards or the narrowness of the fairway.
The one question you need to ask yourself on every is this: "Is this a high-risk or low-risk shot?" If the answer is high-risk, take the 3-wood, which you should be better able to control.