It would indeed depend on your criteria. In my honest opinion the best "social" guild would be Adloquium, they have raiders as well as laid back players. They also have 0 tolerance for drama and provide a non toxic community in this way. In terms of more harcore guilds, The Royalz and Nostalgia are probably going to be the ones to see the server record clears this coming 3.0. Advent Union as well as Critical Rip have been recovering from unfortunate static outcomes however they aren't by any means guilds to sneeze at and are still serious about raiding. My intentions here aren't to cause any negativity, however I recommend avoiding Diamond Dust, Tribe and Geuno.