It depends on what you're looking for in the game.
I describe RPGs as generally being two games. Because they are, IMHO; there's the Talking game and the Fighting game. Sometimes they're very well integrated together -- sometimes they're not.
For the Talking game part of jRPGs, it tends to be very story-driven; on rails, as it were. You start at the beginning, and you end at the end. (Or you get bored and stop playing at the middle.) There are side quests that you can do or ignore, but generally that's it.
For the traditional wRPG, the story isn't driving. It's there, in some form, but the real 'story' is exploring the world. The quests exist as a reason for you to go out in the world, and to try to take you to as many places as possible.
As part of that, your choices matter; they have to, or you'd have no real interaction with the main character of the story. Roguelikes are the root of them; a game where you have no story but yourself and your struggle for survival.
Bioware began more world based -- they're very much leaning towards Story now, and are more so with each game. The Final Fantasy games are strongly about story.
MMOs are about worlds, and generally have weak stories -- and they suffer from the inability to make a real impact on the world. The story progresses, whether or not you in particular have anything to do with it. (And they tend to have NPCs take all the good parts. No one gave *me* the option to have my character become the next Lich King.)
So if you want a world-based RPG? Yeah. MMOs are close to that, as long as you don't mind that nothing you do matters. For single player, Bethesda, CDProject, then Bioware... tend to be mostly about the world, although story gets more and more important as the years progress.
EDIT to add http://spiderwebsoftware.com/ to the list of world-based RPG game makers.