I buy a lot of wine. But I've never bought an entire case (12 bottles) of a single wine. Never. Six, yes. But I was talking to the winemaker, and it would have been rude to only ask for one. Besides money and space issues, I can't imagine myself loving a wine so much that I'd buy an entire case of it.
Purchasing a case of wine would have to be reserved to commemorate something. A year that was so exceptional, worthy of an annual celebration. Too bad I don't have any wines from my birth year - that oversight falls squarely on my parents' shoulders.
There are so many things I haven't done in wine. Tasting from large format bottles. Tasting a wine from multiple (10+) vintages. Whenever you think you start to understand wine, give yourself a kick in the ass, and remind yourself that you have yet to experience or understand anything.