I think guilds is not good to have in fallout mmo. We need to have tribes , clans , corporations or even gangs (small clans ). As a post apocaliptic environment will be the best.

Clan alliances can bring corporation ,and many corporations will born a faction. I can see ingame 4-5 very strong faction on each server,especially pvp server.

Of course devs dnot need to forget about lone wolfs that may be alone but in some kind of mercenary gang that can be succesfull both on pvp and pve ground and even if they dont have a part of any corporation they can take part in pvp and pve and gain great rewards ,but in other ways

I am the Formless in all forms.Strenght si the only measure ,all things can be resolved with violence and blood share.

Yes absolutely!!! No guilds...

And especially the choice to be in one not to be forced into a group but be free with your own mission....like in SWG you could be rebel...empire..or just nothing! I like to be nothing Also gives the feel of being in a...corp...or gang...more meaning...in WoW you are just forced into one...working your way up into something is more awesome...plus you chose it yourself!