When I was growing up and fishing for Large Mouth Bass with my grandfather we primarily used plastic worms. Color and style matters a lot, and different worms had significantly different results. To compound that, the "magic combination" seemed to change over time.
My grandfather always knew exactly which worm we should be using, but I never saw him trying lots of different worms.
How do you determine the color and style of worm to use when fishing for large mouth bass?