I used to get huge S-curves like the ones you describe out of a well-beaten Pro Destroyer. 45 degrees hyzer left, and it still would gradually turn until it was going back right, and then toward the end of the flight, fade back left. I think the lower part of the letter S (actually Z if you go bottom to top) is very fat in this case, and the upper part of the letter is very small.
Distance Drivers: Barsby Boatman, Glow Champion Katana
Fairway Drivers: Pinnacle Rival, Icon Patriot, Protege Rival, Elite-X Cyclone
Mid-Range: Ghost/Wasp, Z Buzzz/DGA Squall, Z Glide
Putt/Approach: Star Classic Roc, Icon Clutch, Protege Clutch