For those that have said you don't like spit - you gotta have some lubrication inside the mouth and around the lips so that it isn't like sandpaper.
I personally don't like to spit on the cock (or at all). I like to suck out every last drop. I enjoy making the guy squirm trying to get away because he's so sensitive and drained.
I like to change things up a little. Minimal DT, lots of tongue and suction mixed with hand and BLS action at times. I prefer the slow, sensual approach, but it all depends on the guy too. I'm not really the aggressive type though.