Hi, I would suggest openSUSE, I use it as well. Here r my reasons:
1. Very stable with less bugs compared to other systems like ubuntu. In fact I haven't encountered one bug in it.
2. Its the only linux system which is as polished as Mac OS X or Windows.
3. It has excellent documentation.
4. It looks good by default
5. Its very easy to use and has a GUI for everything unlike other Linux systems.
6. Hardware support is excellent in all.
7. Great community support as well.
8. Since openSUSE started the compiz fusion project which r the desktop effects then they have the latest ones on it.
9. Novell which is openSUSE's sponsors have a deal with Microsoft so there is better compatibility of file formats and it is the only Linux system which can open .docx files and stuff.
10. All the best and latest software is on it, and its very easy to maintain.
OpenSUSE is perfect for a new user as well as old ones.