Kichwas
Half-breed
This is easy.
My own. When you design your own setting and put enough work into it it can match your specific tastes perfectly.
Or at least as close to perfect as you can get a group of players to accept.
But that's probably not answering the right question.
In terms of published settings from what I've seen I like Kalamar the most.
I'm familiar with Kalamar, FR, Greyhawk, Mytra (or older versions of it), Ravenloft, Dragonstar, Dark Suns, Scarred Lands, Sovereign Stone, Lot5R, Wheel of Time (which isn't technicly DnD but close), Lankhmar, Thieves World, and City State of the Invincible Overlord.
So it's out of that limit of experience that I must choose.
I like Kalamar for it's consistancy and it's solid presentation of a world that is believable within the context of the genre it sets out to define.
Everything in Kalamar adds up to a larger whole and it all fits within that whole. There's nothing in Kalamar which fails to 'do things the Kalamar way'. And if you can accept the rules of a world like Kalamar you get enough detail at every turn to have that world make sense to itself. Everything the people do, every adventure hook, every physical feature, every angle of it... makes sense and gets some explaination.
You never once have to wonder why something is the way it is. Or how something is.
It's downfall is the writing style of the books. If your patient with it it holds a lot of riveting information. But that information does not leap out at you, you have to delve in for it.
My own. When you design your own setting and put enough work into it it can match your specific tastes perfectly.
Or at least as close to perfect as you can get a group of players to accept.

But that's probably not answering the right question.
In terms of published settings from what I've seen I like Kalamar the most.
I'm familiar with Kalamar, FR, Greyhawk, Mytra (or older versions of it), Ravenloft, Dragonstar, Dark Suns, Scarred Lands, Sovereign Stone, Lot5R, Wheel of Time (which isn't technicly DnD but close), Lankhmar, Thieves World, and City State of the Invincible Overlord.
So it's out of that limit of experience that I must choose.
I like Kalamar for it's consistancy and it's solid presentation of a world that is believable within the context of the genre it sets out to define.
Everything in Kalamar adds up to a larger whole and it all fits within that whole. There's nothing in Kalamar which fails to 'do things the Kalamar way'. And if you can accept the rules of a world like Kalamar you get enough detail at every turn to have that world make sense to itself. Everything the people do, every adventure hook, every physical feature, every angle of it... makes sense and gets some explaination.
You never once have to wonder why something is the way it is. Or how something is.
It's downfall is the writing style of the books. If your patient with it it holds a lot of riveting information. But that information does not leap out at you, you have to delve in for it.