Hi Anis
No! Try Sculptris ;) the more easy 3D sculpt at this day ;) But Only for sculptor and sculpting for the moment!
http://drpetter.se/project_sculpt.html

Nurbs is geometry, you can use it without know to "draw"!"
Polygon 3D sculpting is more manual ! And program are in general like gaz engine :)
Artistic thinking is needed"

PS I have forgotten Sketchup, http://sketchup.google.com/intl/en/
i believe that you love it, it's same easy ergonomy than Moi ;)
Maybe more easy it's box modeling but you can make some crazzy thing with it ;) (you can make subdivision with plugin)
see this artist ;) (without subdivision)
http://browse.deviantart.com/?q=ixlrlxi&order=9&offset=0 5 pages!!!