Hey jemate18,
… wecome to our forum.
Reference openSUSE’s unique features, I suspect one can get very subjective answers to that. I believe those of us who are openSUSE fans, all have our own different reasons for using openSUSE, and so no two openSUSE users will answer that the same. After all, Linux is Linux, and if one spends enough time on any one Linux distribution, there is IMHO a reasonable chance that one will be able to tune that Linux distribution the way they want.
The things that I like about openSUSE (in comparision to other distributions) are:
a. YaST - this is a GUI for configuring many aspects of openSUSE. No other distribution has such a comprehensive tool. And users typically either HATE this gui, or they really like the GUI (although some are ambivalent). In my case, I really like it.
b. KDE desktop implementation. Initially SuSE, and now openSUSE, have always been (IMHO) a leader in the implementation of the KDE desktop. While it was noted above that openSUSE’s KDE-4.1.3 implementation is pretty good, IMHO the older openSUSE-11.1 KDE-3.5.10 is still the best KDE implementation around, bar none. Having typed that, I think KDE4 has a lot of promise, and especially with KDE-4.2 (which is NOT available out of the box yet for openSUSE, but can be updated to that via the build service) has come along way, … but KDE-3.5.10 still has the lead for features.
c. the openSUSE community. We have a good community. Sometimes a bit feisty, … sometimes critical, but almost always helpful in one way or another. In particular I like the forums and irc-chat, but there are also the list servers. You can read more here: Communicate - openSUSE
d. the Packman packagers. These are a group of openSUSE users, who take applications coded by various Linux developers, and package them specifically for openSUSE. In particular, the packages packaged by the Packman packagers provide openSUSE capabilities with 3rd party multimedia (and proprietary codecs) applications that do not come “out of the box” with openSUSE. If it were not for the Packman packagers, I would not be an openSUSE user. PackMan :: home
e. the openSUSE build service. This has the potential, as it is used more as a basis for further openSUSE projects, to keep openSUSE as one of the main Linux distributions. You can read more here: Build Service - openSUSE In essence, it means that it will be easier for Linux software to be packaged for openSUSE, and that one need not have only the Packman packagers for 3rd party rpms, but rather a much larger amount of 3rd party packaged Linux packages/applications will now be available, packaged specifically for openSUSE.
openSUSE differs from some other distributions in terms of its package management, and also in terms of its efforts to closely follow the opensoure free software movement. In particular, the latter aspect irritates a lot of new (and current) users, as it means that proprietary drivers (even if price free) and proprietary codecs (even if price free) are not included with openSUSE (because they are not free in terms of the opensource free software foundation definition of “free” ) . Hence one can some times have difficulty installing openSUSE due to one needing proprietary drivers, which are not packaged in the basic boxed set of openSUSE. However typically the openSUSE community try to help, and one can post and get guidance on such aspects.
Here is a link to a basic openSUSE concepts page:
Build Service - openSUSE
Good luck and best wishes to you in your Linux efforts, no matter what distribution you end up prefering.