Best F2P mmorpg?

In your guys opinion what is the best F2P mmorpg?

SWTOR or The Secret World

Tera and Wildstar are also pretty decent now.

Tera - Alrite, but for endgame you need to have irl friends or you get stuck to the regular easy stuff.
ESO - You buy the game, then its free and pretty good till you have to do veteran levels. Then its solo game, and I did try couple days to get randoms for V2-3 dungeons but nope, not happening.
Warframe - It's not really MMO, but you queue with bunch of randoms to planet missions. Mid game is the hardest part to get through, and to get through those I relied one of my friends with stronger character. Great game if you have friends.

Still you cant seriously expect great experience from "Free" games, and secondly MMO's have lost their way by copying WOW's dungeon finders. It's just not the world anymore where friends happen, basically I'm still relying on the gamer friends I've made back in 2010 or earlier, plus several irl friends.

DA:I multiplayer, DB: Xenoverse, SW: Battlefront = no different from 2015 MMORPG.

Sorry for little rant.

Not sure if its your cup o' tea, but Runescape 2007 is active.

Upcoming releases of Blade&Soul and Black Desert.
WoW free to play server Warmane is pretty decent.
Tera- if you don't mind boring pvp.