[psydvl]

There is no one main point, but mostly, I'd like to mention open build service[1], where you can easily create and provide your own repo (but you also can create there one for debian); openSUSE Tumbleweed almost on bleeding edge for packages, but stable, so you can use latest GNOME/KDE/other; YaST very useful tool to change system settings; and the last to mention - zypper package manager is suffer than apt, but I found it more comfortable to use. So, mostly I can recommend you to poke with stick LiveISO) [1]: https://build.opensuse.org/