There’s a fine line between passion and obsession. In the world of stalking largemouth bass, that line comes in at the ten-pound mark on a scale. For most anglers, a fish weighing in the double digits is the catch of a lifetime. A brag most drinking buddies can’t top. A freak outlier that’s part ecological kismet, part piscatory prowess, and a whole lot of damn luck. For Ken Addington, however, ten pounds is just a really good day. His target range when going after largemouth starts at around eight pounds. At least that’s what he’ll have you believe, especially while reeling in fish after fish on a cold November afternoon. “That’s an eight-pounder there . . . with four pounds missing after the hook set,” he…