So far, I've tried 510 atty, 306 atty, KR-808D1 cartomizers (2.5ohm and 2.0ohm.)
306 atomizer is my favorite. I love the sound it makes, like sizzling bacon, and then punchy hits and clouds of vapor I get. The 510s work well too, but I think I prefer the 306. I have some 801s en route from...