Which resources are better at the start of a Catan game?
As a counterpoint to ICodeForCoffee's answer: I much prefer having access to brick and wood on initial settlements. 

Initial brick and wood allow you to get to more positions on the map, to increase your ore and corn income. Initial corn and ore allow you to build cities, which get you... more corn and ore. 

If you start on corn and ore, you can find yourself locked out of the other resources (brick and wood) much more easily than if you start on brick and wood.