Guilds are some of the most important things in any MMO. They can provide a sense of identity and kinship, organize massive social events, or be the leading force in PvP or PvE. We've heard about Zenimax's current plans for guilds (you can be in up to five, you can make guild stores, etc), and it seems that they are opening a lot of potential for some interesting new guild ideas.
What kind of guilds have you been a part of? What guilds would you like to see or be a part of in ESO? Do you plan on making any guilds? Do you prefer large guilds with a massive roster, or small guilds with a tight knit group? What new features would you like to see for guilds?