Ok just to give an idea of what I mean... Here are some thoughts I had and wanted to put into my games
1) A sort of area where only animals could go... so to go through it, the PCs would be transformed into animals
2) A land made completely out of candy and sugar where they would have to survive... but "create food and water" has been tainted and only give candy and syrup
3) And entire dungeon that is just a giant hot tub owned by a Red Dragon
4) A Warrior who rides a mechanical horse with a pole in its back, who can wield this mechanical horse as a hammer.
5) An orb that can grant the players powers but slowly transforms them into dragons each time they use it
6) An adventure where the players shrink down and go inside someone's body as it is invaded by a magical virus where they have to fight it!
7) A shadow creature who creates evil versions of all the PCs, each of whom become big bads in it of themselves.
Actually I would love to have a dungeon that is just the subconscious manifestations of the players
9) A paladin whose armor is flat out blinding to everyone around him
10) A Whip user who uses a whip covered in roses and casts spells that way.
I am WAY too weird...
Yes, mostly like that, but without any big over-arching goal, just events like in the real world. I've run a few plot based games, and they mostly just fall flat for me, the badguy I envisioned just isn't enough for the story, the events don't have the impact I need, the people are too artificial, so I stopped doing it fifteen years ago, and have never looked back.
It is just important to be flexible in your original plans.
I havn't developed the skills for it but what someone told me still holds true... The players don't have the ability to look at the plot... so... Just rewrite it as you go along.
That is what kept my last game going as long as it did
I still prefer story... but my difficulty is translating the story in a way the players can see, notice, and appreciate.
I used to make up things on the spot... but I kind of learned I shouldn't.