I don't like, don't care about, don't want notifications from my window manager. Ever.
Example: Since I manually removed the
virtuoso-t package, my computer doesn't spend ages trying to index its own files. I consider that a good thing. When I start KDE, I get a notification that the Nepomuk RDF service cannot work properly without
virtuoso. So I have to waste a click closing that window.
I also don't update my packages just because there happen to be new versions of things out. I generally wait a while.
When I use
apt-get, which is a lot, I get a notification that there are a number of new 'system updates'.
Every single time.
I'm not interested in using LXDE or XFCE. I prefer pure KDE in a lot of ways. But if I could suppress all of KDE's messages, more in line with the 'no news is good news' user experience, that would really be superb. I'd have so many fewer windows to close at various intervals, after all.