I haven't done enough DIY to vote. VaporWest's flavours (or is it FlavorWest's? Isn't there a VaporWest?) tend to have some kind of remedy aftertaste, don't know why. They don't use vanillin, though, which is great because vanillin makes me sick. Flavourart seems to be very trustworthy. Their flavours are somewhat different. Perhaps not amazing but pretty good. I'm still waiting for my m-type from TPA to end steeping (maybe today) so that I can really taste it, because I only tried it once, when I made the
juice, in a drip tip and the atomizer also tasted like Flue Cured
tobacco (from Dekang, awesome, and I generally dislike Chinese liquids because they taste a lot like disgustinf vanillin too often), so... And I also have their Tobacco Absolute but that's a different story and I haven't done anything with it yet. I haven't tried the others.
EDIT: The m-type from TPA seems to have some kind of sickening feeling to it and I can't tell why exactly. It isn't because it's sweet or anything. It also doesn't have any kind of remarkable TH in a cartomizer at 11 mg. Or maybe it's just because I'm tense. Or because I always find the flavours weird (even - or especially - when this comes from the tobacco plant) the first time I try them...