Victim said:A heavily defined setting has too many lines on the page for players to easily draw their own legends, imo.
Only if the setting details are immutable. If the players have the power, through their actions both IC and OOC, to change the world, a heavily defined setting is a beautiful tool with which to create. I mean, it is one thing to have a PC build a dominion, but to do it on the ruins another dominion he brought to knee... that's a beautiful thing.