I didn't notice 2e being run in any noticeably different manner than 1e, despite the differences.
Perhaps you didn’t run them very differently. But my point is that the success of Dragonlance pushed things more toward a focus on story than had existed previously. AD&D by Gygax was mostly site based scenarios. Dungeon crawls. Wilderness exploration. Scenarios where there was some kind of status quo and then the PCs arrive. Modules were 16 to 32 pages, generally speaking. A main map, the key, a description of the scenario, treasure, and statblocks.
Look at 2e. Look at the shift away from site based adventures to more story based adventures. The Time of Troubles and the trilogy if adventures based on that. The Great Modron March and Dead Gods for Planescape. The metaplot of the Prism Pentad in Dark Sun. And so on.
All kinds of elements that include sequential events rather than just a starting scenario.
Again, perhaps this escaped your notice, but it’s very true.
I plan out connected events that span 3rd(because we don't start at 1st) to 16-20th level. I don't detail them as much as an adventure path, though, and the group can generally step off at any time they like.
Right. But that means you have a strong idea of what the story of the whole campaign will be. You're loosely plotting 18 levels of play before the game starts. Granted, you’re keeping it loose and you seem willing to allow things to change, but I think it’s a good indicator of who is the primary driver of the fiction in the game.
And that’s not a criticism. I ran plenty of games that do this, and I still do. It can be a lot of fun if that’s what the group is into.
Everyone, including me, tosses 3 ideas into the middle of the table on pieces of paper. Then we open them and all 18 ideas are written down in on sheets of paper and each of us can veto a single idea that we dislike. That leaves us with 12 themes which we each then rank from 1-12. The 3 ideas which get the most points are then discussed by the group and either the players pick one, or if they can't decide they rank the 3 ideas from 1-3 and we use the highest point total. If the final goes to a vote I will get a vote.
If that works for you guys, that’s awesome. I’d feel like it was very likely to potentially leave everyone unenthused if you’re left with a campaign consisting of everyone’s third favorite thing. But that’s just me.
They had me do it rather than the above method. Essentially I came up with an idea myself and just enacted it. It doesn't happen often, but sometimes they don't want to pick the theme.
Right, but was it really all that different? I mean, in this instance you kind of came up with the theme or premise yourself and then crafted some stuff for that. But typically you’d take the theme and premise selected by your voting process and then craft some stuff for that.
I use the Forgotten Realms, so the Pirate Isles existed in the south along the Sword Coast prior to their decision, but I had nothing prepared. It took them a while to make their way south, so I had time to make some preparations in response to what they did. If in the middle of being pirates they got bored with it and wanted to do something else, then they could do that.
I react to their decisions.
So you had a starting point and basically made them travel from there to the pirate area and used that travel time to buy some time to have piratey stuff ready to go by the time the characters made it there?
At that point it was, since the players bowed out of it. I determined how the rest of the world was dealing with it(badly) and rumors were heard by the PCs. Had they remained, the story would have been a mutual thing with me reacting to the players. I've had huge portions of prep voided by what they do and had to prep differently, even with the original theme due to what the players do.
Why not just abandon the stuff if the players weren’t interested?
Randomly. I figured out odds and then rolled for it. Solo play isn't my thing, so I wasn't going to play it out.

It didn't matter what I wanted. The world is the world. Events are events. And rumors are rumors. This event was a very major one that would eventually touch most of the Realms, so there was no way it wasn't going to come up at least in rumors. My desires had nothing to do with it.
I don’t see how that’s possible. You’re in charge. You can make something matter and bring it into focus or you can allow it to fade away. The world doesn’t have a will of it’s own.
I mean, if it wasn’t something you desired and the players had already indicated they weren’t interested, why have it continue to be an element in the game?
One of the advantages of a DM led game is that it gives considerable control to the DM.