i think to stop grinding you would need just a skill mmorpg like darkfall, but im not sure of any free ones. Would be nice to stop grinding, but i think project entropia is a good free non grinding one. But that game is almost unplayable if you dont money order ped
Only none grindy game I can think of is uhhh, anarchy online doesnt require much grinding at all, F2P, and P2P, (p2p gets the expansions) grouping in anarchy online is done a lot and exp is made easily at the right places. I also play MxO (matrix online) its P2P but really its not monotonous grinding just missions over and over which isnt too bad, makes you rich lol
Its not nice but almost all mmorpgs require some sort of grinding... World of Warcraft is a free mmorpg but its one of the only ones where you can level mostly through quests and not killing the same monster over and over. Most mmorpgs center around the leveling process which is unfortunate because a lot of people simply want to PvP and maybe go through the leveling process once because then its almost the same when you make an alt. I don't know many free mmorpgs that would meet your criteria but check out WOW if you want a good one blizzards a good company.