There aren't many general statements you can make about coil types because people's tstaes and perceptions all differ. Personally I mostly use single strand round wire coils for e-liquids with only one or two flavour ingredients because the simpler the coil, the faster the ramp-up (usually), whereas for complex juices I used more "exotic" coils that allow the different components of the juice time to develop. The factors you're looking at are basically temperature, heat capacity, surface area and time. Like all things vape-related it's a case of - literally - suck it and see, which mightn't sound too helpful but on the plus side, experimenting with rebuildables is going to be a tiny fraction of the expense of doing it with stocks.
