Cotton is very much subjective to everyone's individual taste/preference. But is seems like there are those who treat it as some sort of religion, "Mine is bigger and better than yours", "My Cotton is the one true Cotton, every other is false and is of the Devi", etc., etc.l!!!!!
I've tried a number of shit, Cotton Bacon V1 and V2, it's decent. But honestly I heard it was just repackaged Sterilized Medical/Dental Cotton, so I tried that. Yep, same shit. I've had a few people check it out when I was in a couple of B&M's to see if they could tell any difference, they couldn't. So I bought a couple of 1 Lb rolls for around $16 each, since it comes in one giant roll It's fluffier and I like it better than Cotton Bacon.
I then tried Muji, great Cotton and really liked it.
I then tried Koh gen Do and I just fell in love with it. Very easy to use, very little break in, soaks up juice very quick and efficient, large pads and very easy to Scottish Wick, just love it. The price is great, a bag from Amazon is only around $11 for 80 very large pads, this will last an average vaper well over a year.
Still trying more wicking material I tried degummed Hemp fiber with ElfWick, not bad but difficult to use and there are a lot of stems (picking them out is too much a pain in the ass. It has a different taste during break in, not bad though. Once broke it in it works well, advantage with it though is that if you ever get a burn hit that would kill cotton with Hemp fiber you just rejuice, it won't spoil the wick like burning your cotton. Disadvantage with it is that it doesn't wick as well as cotton so you don't want to use it in a tank, only RDA's. But for me why I moved on from it is picking out the stem's is too much a PiA. If anyone would like to try it IM me, I'll send you some just you pay for shipping.
Organic cotton balls, meh, doesn't perform as well as Muji or come even close to Koh gen Do. Plus not as easy to handle as using pad's.
Cheap Cotton that you have to boil, seriously, not worth the time to save a few pennies.
Supmia Cotton, very nice, wicks good, very soft (softest cotton I've ever tried) and it has very long fibers so it wicks well but is expensive.
I then tried Native Wicks Platinum Blend, think of something like Cotton Bacon but based on Supima Cotton. This is my favorite "premium" cotton, but you do pay a premium price. Very easy to wick, really sucks up the juice fast, very little break in, long fibers that have been fluffed up. I get a bag of it once in a while and use it as a change from my Koh gen Do just to mix things up. With the FDA and Government fuckery coming down, I'm thinking of stocking up on a good supply of it. so I'm keeping an eye out for a sale and plan on getting a dozen bags of it for my Vape Apocalypse stash. It really is very, very nice to use.
Silica and Rayon, I really don't have much of a desire to use it. I may one of these days but I just prefer to stick with Cotton or Hemp (if I can find a suitable Hemp fiber).
So my mainstay is Koh gen Do, I just love it.
Anyway that's my opinion on the wicking material I've used, the best advice I have is to check around and try out the different stuff available and use what you like. And those who treat wicking material as a religion, get a clue. Everyone has their own tastes and preferences and one size does not fit all, so get a clue