Joining the outnumbered faction is quite a good idea if you want the better community, for several reasons.
And then if you find one that seems interesting enough, make an application and if you get to join, get to know the people in the guild.
Never understood the guild concept. And that after 9 years of MMO experience.
Every guildpost is usually like "We do everything, have everything and are all best friends" I just have to look at the posts in this forum and they all sound similar and just try to convince you, that THEY are better than the others without any proof or justification.
If I want to remember nice people the friendslist is the only correct option.