Around here, Trout, salmon, walleye, and panfish are all more popular than bass. But bass have some inherent advantages that make their appeal much broader and more widespread:
--They are adaptable, and can thrive in many different environments; so in most parts of the country you're not far from good bass waters.
--They are frequently found shallow and shoreline oriented so they're among the easiest fish to access no matter your means.
--They strike virtually every kind of natural bait and artificial lure, so you have a good chance of catching one no matter what you're using.
--They are hardy and robust, tolerant of human development and activity, and not particularly fragile compared to other gamefish.
-They are big enough and athletic enough to provide excitement, but not so big they are hard to handle.
-They are easy to catch occasionally, but challenging to catch consistently, so they appeal to both novices and experts.
All together, these factors have conspired to make bass among the most widely familiar fish in the country to casual anglers, and an absolute marketing dream for the broader fishing industry, which has taken advantage.