[quote=Daikirai]
I probably misunderstood what I read, but I thought that I heared that joining a guild/faction was nessasary, since it would tie into the main quest. I could be (and probably am) wrong, though.[/quote]
Why would it be necessary? Unless you're talking about in Morrowind, where you automatically join the Blades because it's part of the plot. (Which I hated with a passion!) Luckily, you were never forced to keep in contact with these guys ever again.
I do not think you
have to a join a faction/guild, unless you want. I think they meant that the factions/guilds will be like... subplots, I guess.
I do not want to be forced to join a group ever again like they did in Morrowind. That would be annoying and limits on what kind of character I want to play as and limits a bit of my freedom on my decisions. (None of my characters, if they had a choice, would ever join the Blades in the first place).
(EDIT: Darn you, double-negatives! I hate the English language sometimes!)