No one wanted the name BF in WoW, I believe this will hold true to GW.
From experience from a number of RPGs, the guild names that have the words "Dragon, Shadow, Night, Elite, Uber, 1337". From every server on RO, WoW, EQ1 and some of GW's beta, the best guilds have names that are kinda abstract. Examples are Catalyst, Immortal, Forsaken, Defy, etc.
Or you can be awesome cool and call it Samsara after your favorite person in the world
Seriously though, don't go with BF in the title, just use it as our official guild and use BF for posting any guild related things. Hell, it would bring a lot of members.