Just thought I'd put out another browser based game that's f2p, though there are some store-bought bonuses available. It is totally non-pvp, the official game IRC chat has maybe 20 people in it at a time, all decent folk and almost always a mod or two present to take out the trash when it tumbles in, and lots of helpful people and guilds.
http://www.core-exiles.co.uk/When you join, there's a refer-a-friend program going on, my username is Sonya the fox, make sure you get that right because it's free stuff for you to do it. Also drop me a note in-game as well as Aello Starfire for a guild invite to Academy of Intelliquest, the newbie branch of the guild I'm a part of. One of the things the guild does is a list of 'missions' that involve making you learn some of the ropes in exchange for credits and certain loaner gear that makes things easier on you.
Forgive me for giving a poor 'sales pitch', it's why I'm not a salesperson.