With the exception of some diving very close to shore, ALL the dives on the island are drift dives, including Punta Sur and the Palancar. The current at Punta Sur can be incredibly strong. Some of the shallower sites can have the strongest currents. One site with regularly strong currents is Cedral which is shallow. The current at San Juan which is an average of less that 55 ft deep can be so strong that it feels like you have been shot out of a cannon. Paradise usually has less current than a lot of sites, but it is incorrect to say that there is no current there. As a matter of fact the current at Paradise can be tricky as it tends to change direction more than other reefs, especialy in the spring. There are some days when the current is ripping and other days when it is very gentle, but days without any current.....out of few hundred dives a year, maybe one or two dives where there is no current. During certain conditions the current can change direction at any reef. I have started at the end of Santa Rosa and went backwards all the way through the cave at Cedral and surfaced at the platform at Cedral.
As correctly pointed out, your buoyancy must be dialed in to keep you from bouncing off of the reef. Follow the DM. Do not allow yourself to become seperated from the group. You would be stunned how many straggler divers we pick up over the course of a year.