Well, as with so much else, variety is the spice of life here. I'd say that in general I'd go with the approach of having the lady guide me about what's floating her boat at the moment,

BUT

One of the best sessions ever took place when a well-known SA provider, since departed, treated me to an unexpected doubles with a favorite lass of hers. This second sweetie smothered me while #1 romped away down below. I can almost feel yet how tighlty #2'a thighs were clamped around my head! So "vive la difference!"

Will