It depends on the style of vaping you prefer, the mods you use, the power you use, the juice flavors you use, even your choice of wire material/cotton plays a role. This question is too open-ended to give any kind of real answer. So in general IMHO a basic coil of round wire is what I consider a baseline. Its fine in a pinch, works great for testing a juice you aren't sure of, but it will never be the "most flavorful".