Everquest. That was the first time I felt that awesomeness of finding a center of people that I could call friends/family. Until EQ2, where I met a solid group of people and again they were family. FFXIV was the next place that i found that comfortable feeling. The content (for me) has nothing to do with community. It's finding the right people to play with.
PS. I have played many MMOs. Only a few, have they had good families.