I smoke everything quite moist, and straight out of the tin, and I also have never found a tobacco I couldn't keep lit.
I don't like the fact that some SG blends are overly moist, because I feel I am paying for water, rather than 50 grams of tobacco. However, I haven't found one that won't smoke fine...but then again, I usually fully rub out SG flakes (and I haven't tried the notorious Full Virginia Flake.)
The only blends I smoke somewhat dry are Virginia No 1, and any OTC or OTC style Burley. I fill up my snap pouch, and by the end of the day, it's quite dry, and nearly empty. I find Virginia No 1 smokes much smoother dry, even crunchy dry. Everything else, I'll smoke fresh. If I carry around some flake, I'll keep it in the tin. I never deliberately put out tobacco to dry it. I don't smoke any ARO's on a regular basis, so I can't comment on them.