I'm not sure I have a grail bike. Sure there's lots of bikes that I think are very attractive and would like to own, but I don't have one that I just NEED. Maybe it's a financial situation thing. I have a fast steel road bike and my next build will be a steel touring/commuting/gravel bike, and that's enough for now. If we get further ahead on our mortgage and kids' college funds, then I might think about looking. I love shiny things, so it'd probably have lots of chrome, or fancy lugs, or mxl tubing.
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Bikes: 1996 Eddy Merckx Titanium EX, 1989/90 Colnago Super(issimo?) Piu(?), 1990 Concorde Aquila(hit by car while riding), others in build queue "when I get the time"