WoW is fun... I think I get negative because of the amount of groups I join that fail (can't complete a heroic to save my life)
Seems to have improved a lot since I did 4 complete ones last night lol.
I do agree with your definition of grind though... Cata is anything but a grind. It is actually the least grindy of all expansions so far... leveling is by far the fastest and the smoothest.