You guys/gals have me interested! I've never played a "real" RPG before... unless you mean the rocket propelled grenade type...
I got into Oblivion at the beginning of this year, and still play it thoroughly today. Third or fourth time around, and still got 100+ hours per character. Just love it, and yes, the mods make it so much better/harder/more engaging.
So, I'm keen on trying this out. I heard about it a while ago (maybe GG) and it piqued my interest then. I'll certainly try the demo, and hope it goes well from there. Having never tried Arcanum or Planescape, I feel there's a whole part of my gaming life I've missed out on!
Look forward to seeing how this pans out.