What is the best pre-made campaign?
Forgotten Realms seems to be the biggest with a and at least 4 add-ons but is it the best?
Is Dragonlance any good?
d20MODEREN?
Sword and Sworcery Everquest?(but isint that also its own game?)
Oriental Lands?
Ghostwalk?
Anything else?
I think you mean Campaign Setting as opposed to Campaign. A campaign is a game and you’ve listed settings, though practically all campaign settings have some pre-made campaigns too.
My friend uses Forgotten Realms or ‘Faerun’ as the land is called, I haven’t used it but I like the Gods, so I use them in most of my campaigns.
As for Oriental Adventures, you can use a setting called Rokugan, I have a map and some other tidbits of info from the OA sourcebook but its not really enough to run a campaign in.
D20 modern is different from DnD I think, it has a different range of books and rules but I’ve never tried it.
Dragonlance, I’d like to try, there’s some books I was going to buy.
And I also have the Warcraft campaign setting although I’ve never used it.