I use published worlds as a skeleton, upon which I add, subtract, and change things as best fits my needs. For example, I'm currently running a nominal Greyhawk campaign because it was easier for me to tap into the pre-existing pantheon and world map, but I've changed things up as needed. My Greyhawk City, for example, is a coastal city, and I've used Oghma as a demigod of knowledge. I sprinkle in cities and towns from published adventures that I want to run wherever they fit best.
In 2E, I ran a Forgotten Realms campaign in the same manner. Fortunately, I've never had players who insisted that my version of the campaign world exactly fit the mold of everything published in that campaign world, so I haven't had any real problems.
Johnathan
In 2E, I ran a Forgotten Realms campaign in the same manner. Fortunately, I've never had players who insisted that my version of the campaign world exactly fit the mold of everything published in that campaign world, so I haven't had any real problems.
Johnathan