So, you are hitting a common problem with many creators. We, as creators, want to be inspired and fulfilled from the experience. Simultaneously, people are yelling at us that "it is all about the viewer and what they want". But that doesn't always move or inspire us. What I say is that if the creator is not fulfilled or inspired, no one gets anything. No videos are created or it becomes a slogging experience. I have no issues about taking of me first, before the viewer, because I know if I don't keep building my library of videos, it all comes to a halt.
There are a lot of personality types and all types of YT channels. I think some genres are easier than others. Some are more difficult. You will have to look at that.
The repetitive videos you see are generally a pragmatic approach. Those creators keep feeding different variations of the content they believe the users want. But like you, I like to mix it up.
I give myself permission to do "concept videos". These are videos that have no particular logical rationale but you just want to try it "just because". Do you have anything you want to try "just because"? Being a smaller YTuber, you have a lot more freedom to experiment. I enjoyed that process and still do like trying different things.
The other thing you might want to try is to make a list of things you are generally passionate about (logical or not, popular or not) and WISH you could talk about. In that list, you might find nuggets of ideas. You have to give yourself permission. I see so many artists, writers, and creators get frozen up because they don't think it will be good, popular, liked, whatever. So, if you can unlock and give yourself permission, you might see more ideas.
There is just too much "should-ing" going on.
Essentially, I think creators generally have a lot of ideas but we prevent or filter ourselves from exploring them. Once we get a nugget of an idea, then we can go to work in adapting the idea to our audience. But in the absence of the ability to "adapt it" maybe produce the video anyway. Get it out of your system. You never know how audiences will respond.
Some of my best-performing videos have been just crazy ideas outside my main genre. I didn't care. If I got a bug about something strongly, I am going to do it. I don't care what anyone says. It is my channel and if I want to create a video that has zippo to do with my main genre and falls out of the bounds of logic, then so be it. A lot of learning comes out of the experience.
My suggestions are a bit esoteric because that is how I operate internally. As it goes through my unorthodox creative process, I adapt and solidify it into something more "practical".
