All of the above.
It really depends on my mood. Yesterday I smoked out of a small marble pipe solo, then my buddy came over and we did bong rips. Sometimes we smoke blunts, joints, Volcano, gravity bong, brownies, cookies... Variety is the spice of life.
We do go through phases. We did favor the Volcano for a good 6-8 months; now we prefer the RooR - but joints and blunts are gaining popularity.