Getting big flavor to go along with those big clouds is not impossible at all. Ive got three RDAs and two hybrids sitting in front of me at the current moment, and the three RDAs are all below 1ohm. One is a single coil .8, and other two are dual coils around the .3-.33range.
More vapor than a fog machine, and more flavor then even my genesis hybrids are putting out.
Its all about how you set up the coil in relation to the airflow of the particular RDA. Go ask ANY of the ReoGrand/ReoMini users who use their mods with the RM2 atomizer. Instead of a billion different RDAs being used, like the general vaping community, that circle of users largely uses the RM2(not everyone does obviously), and as such, they have learned the ins and out of that RDA very well, and can tell you how to set it up to do whatever you want. Big flavor? More throat hit? More vapor? All easily attainable, simply by adjusting the airflow over the coil.
However, for a much simpler solution, check out some videos on Micro Coils and Nano Coils. Particularly the more involved builds like the dual dragon nano coil. I dont usually build compressed coils, I tend to prefer a regular, spaced coil, but the compressed coils are known to put out tons of flavor, mondo clouds, AND it can all be done above 1ohm, which is where you should be considering you're just starting out with rebuildables. Subohming is great, and can be done safely to enjoy a great vape.. but.. baby steps. Get the above 1ohm coils down first.