I posted way back in 2002 that 'would kill for an Orval Ale'...now I don't have to....I was give one for Christmas. Now I have the dilemma that, once I drink it, it will be gone, so I am pondering what 'occasion' is JUST right.

This suggests my revised answer to the original question:

If I was condemned, or had to choose ONE beer for my last, it might well be an Orval....but if the question is: "What beer would I choose for a lifetime supply on a desert island?" I might choose one of the Dogfish Head IPAs.
This choice could easily be revised over time if I could sample all those interesting items mentioned above by others...especially in England.