If anything I would be happy to see mega-community guild that goes through dungeons, does pvp and role playing. I think that this website is the perfect place to start it as we are all TES fans who share common interests. Too bad Ponty cant host it but thats understandable, It takes alot of commitment.
Said it before, and I'll say it again, I'd be happy to be a part of a blog guild.
As for what my personal leaning in-game will be, I do not know. Traditionally, I've been a really big PVE'er, but ever since SWTOR, I've really gotten into PVP and may well be more focused on PVP in ESO's endgame. I've found endgame PVE to be rather tiresome and too much like a second job. (Raiding = Not really all that fun).
All that said, I'm not very hardcore into anything other than exploring every freakin nook and cranny of the game world and finding out all its secrets. So, a guild would be more about having a social outlet and some reliable friends to group with from time to time.
I am not a big Raid/PvP person either because I have not really been an elite player in MMO's. Although I do want to be able to experience all aspects of the game instead of not being able to run a big storyline dungeon with people who say your not good enough to play with them.
I was VERY happy to find that out. :) I hope you don't have to visit other factions in a sequential order, though. The article I read about that seemed to imply you'd finish your personal faction, then go to another faction and finish their content, then go to the third faction and finish their content.
Not sure, I think you have to sort of ''unlock'' them, and I know that you'd be playing at a higher difficulty level with higher rewards in other faction. Might mean you do have to do one before the other.
Also, I believe it was story-bound, and I think you can't see any players from other alliances, you can only see others from your alliance who are also there. The devs mentioned you'd be seeing through the eyes of the other alliance, what that really means I can't say.
According to IGN who alpha tested the level cap is 50
After watching cinematic trailer it makes me want to play a Breton assassin