Well, I think that the rig will depend on the presentation you want for the fish, and how you are fishing. What is the structure on the bottom of the lake? They can all make a difference in the choice(s) you make. A carolina rig typically drags very slowly on the bottom, with the worm trailing above the bottom. They are typically not as weedless as Texas rigs, but the worm itself can be Texas rigged behind the Carolina rig to make it more weedless. Texas rigging is good for very weedy lakes because of how weedless the rig is. It is also better than the Carolina rig for presenting right infront of finnicky fish and just leaving the bait there until the fish takes it. The drop shot is a great vertical presentation rig. It is typically a relatively stationary presentation (ie - deadsticking, letting the worm do the work) and is good at maintaining the bait at a specific height. So, if the fish are finnicky and suspended, this can be a killer. It is good to know the different uses and applications of all the rigs.
LOL - in the end, I just gave the standard "It depends..." response... lol
TIM