Some good free online mmorpgs?

I hate runescape, knight online is repetitive, flyff wont work on my computer, priston tale is good until you learn that you have to pay past level 30, maplestory is kinda dumb and way too laggy, silkroad is so glitchy you want to kill yourself,bots is really fun but too laggy,slow, and unresponsive, and pirates of the carribean online is just terrible. Any others I don't know about that are actually good?