JoeGKushner
Adventurer
I would add that 3.X is better suited for world building, but that scenario building and preparation is probably easier in 4e.
The Auld Grump
I found this a strange statement.
Not because I don't find that gaming mechancis do NOT have an effect on the campaing, but because unless the world building aspect is heavily reliant on the magic or alignment system, I find that most instances the game system can have minimal impact on setting design.
Other opinions?
Note, I'm not asking about 3.5 versus 4 here, just the overall impact that the game system has to have on world building.