Here's the info for Guild Wars 2, which is / can be free2play'd.
TL;DR / Sales pitch:
- MMO with a solid free2play model (you literally get the whole base game, what people played for years before the expansion came out), and no sub cost.
- PvE: Minimal grind for gear (because of standardized stats, no need to hope for a good item level roll for acceptable gear). Server choice doesn't matter, as you can play across servers seamlessly. Only thing that matters is NA vs EU (I am on Yak's Bend, an NA server, so plz pick NA! :P)
- PvP: You can literally make a new character and go into pvp and be on the same level as everyone else (auto-max level, standardized gear, switch builds at-will between matches). All skill and 0 Grind. Never will you feel "arg, I lost to that guy because his gear was better".
I have played most facets of the game at one time or another. Started as a PvPer, came back for World vs World, came back to PvE. To me, this seems like the perfect MMO for people who don't have a ton of time to pour into a "new MMO", while still retaining the feeling of progression via cosmetics / skins. Happy to answer any more specific questions anyone may have.
P.S. If you want to hang out and talk video games, we have a slack channel, #esports