KGD and COTN threads for me.
In the past, always used KGD for everything. Received a sample pack of COTN threads with an online order and picked up a few packs of it after trying it in my RTAs.
I'm 99% a squonker, and my RDAs are very carefree as far as wicking with KGD. I don't even bother peeling the outer layers off. Just cut to width, wick the coil and cut the ends. No fluffing or anything required. I vape unflavored and can't taste anything related to the KGD cotton.
When I am using RTAs, I was converted after trying COTN threads, and that's pretty much all I use now for RTAs. Similar to the above, just pull it through, cut to length, and tuck in the ends. No dry hits, no leaking, just perfect. No fluffing, primping or anything special required. When I use KGD with RTAs, I have to be more careful and particular about how I wick them. With the COTN Threads, it's pretty much foolproof.
So I just pick up a bag of KGD pads, and I'm covered for a LONG time with my RDAs. Very inexpensive for how long the bag lasts.
With the COTN threads, I use single coil RTAs, and don't use tanks that often, so they last a while too. Especially with unflavored juice, I can go several weeks without rewicking. I said I would never pay for 'special' cotton, but for how simple it makes RTA wicking, it's worth it to me.
So, KGD for RDAs, and COTN Threads for RTAs