I'm interested in learning what most people think about caliber popularity. So, here's the question: What would you say is the single MOST USEFUL caliber? By that I mean what caliber can you do the most with? That includes recreational shooting, competition, hunting, home defense, etc.. Kinda like that "What if you could only have one?" question.
You need not expound on your answer, but are welcome to if you are so inclined. Thanks to all for contributing.
IMR