I've just started playing DDO(Dungeons and Dragons Online) guys and its great for F2P and I have only played a few days. From what I have seen a lot of content is free, with a VIP for some races/classes/dungeons. Good time waster if you don't have the money to buy a bigger time waster = WoW.
So far, you level by quests not grinding, mostly sort of. You grind within a quest usually with a main mission besides grinding points, then get xp for it. And most of these quest you can solo, and it doesn't feel like mindless grinding, side quests in the quest area, finding hiding passages. Optional tasks, more challenge.
The best part is the community is mature and willing to help.
So check it out if you feel you need a new rpg thats free but decent.