Since I made the Aqua set, I'll give you my take.
Make it exactly how you want. Once you start to cater to others, it'll just keep growing.
I actually only use about 10% of what I put in Aqua.
I'm currently (on and off) working on a very simplified Flash screen. I started making it for other users, but scraped that and will make it exactly how I want it. If others like it fine. If not, oh well.

And btw, a lot of people make very simple screens for their own use, so there probably would be a demand for it.