Didn't we already have a couple threads like this? I kinda post similar things in each one but oh well.
Easiest and simplest fantasy is that I want a diapergirl harem that I can do whatever I want with. Some are my personal playthings and some are my caretakers because I would be diapered 24/7 as well as them.
If we're doing unrealistic fantasies, my ultimate dream would be to live in a world where everyone wore diapers all the time, and that people weren't embarassed by them, but were openly walking around wearing diapers all the time.
I go back and forth between wanting to be taken care of by a loving caretaker(s) and wanting to be dominant over a bunch of diapergirls.
In the submissive fantasy I want there to be a bunch of matronly women with big tits and big butts, preferably in an exaggerated 50's domestic housewife kinda look, with the exception being that they're also wearing huge diapers.
They keep me in diapers so thick it's very difficult for me to move around, and my body's been altered so that I pee and poop in massive amounts, prompting frequent, loving, tender diaper changes from them. Full of cute little phrases like: someone made a stinky for Mommy, what a big boom-boom diaper, etc. Diaper changes, whether wet or messy, are never treated like a bad thing, they think it's wonderful when I use my diapers and are happy to have the opportunity to change me.
In addition, my body has also been altered so that I can cum in massive amounts as well, frequently throughout the day.
My sexual urges are mostly seen by them as something else they need to attend to in taking care of me, and when they see that I'm horny they pleasure me and encourage me the whole time.
On the other side of everything though, I also have lots of dominant fantasies where I have a harem of babygirls that I can boss around. There's a lot of fun stuff associated with this. My favorite is making them have to "earn" diaper changes in various ways. Either by pleasuring daddy or doing chores. But because there's so many of them, they can be pitted against each other to earn changes. They have a messy diaper contest, but only the messiest little girl gets a clean diaper, the rest have to stay in it for the rest of the day.
They have a beauty pageant, with only the winner getting a change for the day, etc.
Also, since I'm diapered in all my fantasies, even in the dominant role, the submissive babygirls would have to change me, even though they're reliant on me and my decisions for their diaper changes. Babygirls could ocasionally take care of other babygirls, but they'd be ineffectual at it, and grossed out by each other's dirty diapers despite often being in dirty diapers of their own.
Also, crossover between those two worlds would be fun, the matronly diapered women could take care of the babygirls and me, or we could just have a large, incestuous diapered family with me as the daddy.
There's also a lot more banal stuff wrapped into all that. Like I'd love to have my diaper changed by a hot woman in public, like incredibly public, in the middle of a mall or something. Also, I just love the idea of a hot girl, or girls, going about their days openly wearing diapers like it's just completely normal and commonplace.
That's everything I can think of at the moment but I think about this stuff a lot so I might write some more detailed stuff out eventually.