I would think it's easier to meet nice people in pf or when you aren't in an FC. Example, I check PF constantly for clear parties and join to help whenever I can, I've run with groups that had 3 or 4 primals to clear and whenever you run so much content with the same few people you're bound to chitchat. As for not having an FC, if I see someone with mismatched gear without an fc I'll usually offer to gear them up free of charge. However if they are in an FC I just kind of assume their FC mates can help and they don't need advice, gear, what have you.