The ability to have a non-immutable distro with GNOME Vanilla out-of-the-box perfectly functional and without unnecessary pre-installed packages and applications; and the fact that it works like a modern operating system without having to get lost in lengthy and complicated configurations.
However, I would like it to be more timely with updates and for this timeliness to be the same for all packages; unfortunately, as of now, this is not exactly the case. I would also like it to be rolling and not fixed (this would eliminate the problem of versions lagging behind with updates).