Much belated posting.
My primary game world is called Trinalia. It is a psuedo renassaince era setting like many D&D settings. I filter out many prestige classes and monsters, but generally let core classes and spells as they are.
The feel of the world? You might call it "High intrigue, High fantasy." The world is full of people more powerful than you, and they all have their own agendas.
The campaign has a very deep and involved history that I draw on for campaigns. If something happened in the history of the campaign, you can guarantee it will affect the PCs sooner or later.
The world is also evolving. At one time I read something in a magazine that fantasy games tend to be set with evil strong and good on the rise, or vice-versa. I originally started my campaign world about 15 years ago with the premise that the world is essentially pure with little in the way of evil influences. Then the machinions of one god set into motion a chain of events that caused something of a scourge on the land. That was the backdrop of the campaign setting 15 years ago.
Now, I am deciding that evil is making its march, and soon, evil will reach its apex. The campaigns I am running right now will end with one of the major evil nations falling, but this only creates a power vacuum for a more indidious villain. That villainous nation too will splinter, but the resulting war will be devastating. Then the cycle will be complete, and I will be at the other end of the spectrum: evil will be dominant, and good will be on the rise.
I have other fantasy campaigns in mind. One my PCs are currently visiting is in a post magical apocolypse world that is set during the receeding period of an ice age. The world is more primitive, with fewer great nations and more barbarians and more mindless threats, such as hordes of ravenous insects that were left over from the ancient magical wars. So far, my players have said they like this world, too.
My primary influences:
Stephen Brust's Vlad Taltos books.
The Final Fantasy series of games.
The games of my first DM (which in turn had a lot of influence from Conan, and Marvel Comics' Thor and DCs' New Gods)
History and Mythology (especially east Asian history and Greek, Norse, and Egyptian mythology.)
My players have told me I should market my world. I know better... my game world is too close to mainstream fantasy worlds like FR. However, I like to think of my world as a less cluttered FR. I think FR has some great ideas, but as a whole, it is a jumbled mess. I feel like my world's history and relations by way of comparison fits a lot tighter.