Easy-to-find blends that are extra robust include C&D Stratfordshire, Tuggle Hall, Big'n'Burley, Dark Burley, and Bayou Night, for starters anyway. Old Joe Krantz original and Billy Budd are also quite substantial. GH strong blends include brown rope, the only slightly milder black rope, and if it ever appears on the market again, the Indonesian air cured burley Tambolaka. Tabac-Manil Semois thick and medium cut are fulsome single leaf Belgium variants for people with a taste for stronger burley. For a while, only the stronger blends would do for me, but now I enjoy a whole range, even to the very mild, so when I go back to the stronger blends, I get the full effect. I don't smoke 'em for the nicotine but for the flavor. When I skip smoking for a few days, I don't have cravings. I think my nicotine receptors aren't all that responsive. On a rare occasion or two, I've gotten light headed, but I wouldn't place any bets on myself with really strong leaf.