I'm just looking for a game that has an active population and a focus on community, in terms of guild/clans/ect. I'm prefer an MMO, none of the lobby based games. Preferably F2P also. I've tried a few games, like Grand Fantasia, but nothing worth mentioning. Any suggestions?
Kinda tough to find any of those nowadays to be honest. A few of the old school ones have retained their emphasis on community being tight knit.
Lord of The Rings Online
Dungeons and Dragons Online
That's all I can think of right off the top of my head. If anything try looking on the forums for a guild to any game you decide to join since that is basically a community within the main community of the game.
I'd suggest you look for a listings first to see how many people are playing that game. Take for example Ragnarok Online private servers. They usually have a website that show those kinds of statistics. Just visit different official sites of MMO games to check their player numbers.