Every year, I head south to the Gulf Coast for vacation -- at least once, more if I can manage it. The last few years, it's been Orange Beach, Alabama, in the same condo complex, which is located (a) on the beach and (b) across the highway from a seafood market. And every day, I stroll across the highway at about 6 p.m. to pick up that night's dinner -- fresh shrimp. Shrimp, corn, potatos; homemade cocktail sauce; sliced avocados sprinkled with lime juice and chili powder; with ice cold…