Bug#718855: desktop=xfce installs Gnome stuff and evenmore gnome appears as the default window manager from lightdm
I think that installation of complete Gnome even with the election of
XFCE is caused by network-manager-gnome package. I use wifi connection
to install from debian-installer.
If this network manager is installed, then all Gnome installs, because
its default configuration is to install recommended packages, as well.
Instead, I tried to do:
apt-get install network-manager-gnome --no-install-recommends
and then only dependencies are installed (not all Gnome, only about 30
MB. It was hundreds, with the default!)
I don't know if this should be reported to network-manager-gnome
maintainers, but I wanted to inform here (I know that in the past
there was an intense discussion about this issue...)