RDA only because I mainly vape NET's which are tough on coils; RDA's are generally simple to maintain. BTW, not a serial killer here although have been known to kill many bowls of cereal but that's a story for another day (would have to be a very boring day though as eating cereal is kinda uneventful).
However, all joking aside, I find RTA's to be a pain to coil or wick; fat fingers, bad eyesight, and no patience is not good when trying to build coils and work on tiny decks. I always end up with burnt cotton or flooded channels. Just not worth the effort to me. When in on the road for a while, I use Nautilus tanks and was even thinking of getting a sub tank for these times. For how little I use them, it's worth the extra price per coil to get a satisfying vape and not have to worry if I did everything right and my build will last the trip.