uMatej, great point :)

I've found with my builds that you can get more vapor with a smaller coil, but the surface area from larger coils gives better flavor (all other things being equal).

My first build on the Aqua was 0.4 ohms. It gave pretty good flavor and a lot of vapor, but was a bit hot due to the small chamber. My current build is a 0.6 ohm build which gives better flavor and only slightly less vapor :)

Chances are, I'll still change it next time I do a build to find the sweet spot.