Has anyone else realized that with Skyrim, the members of the Guild's actually fit their guild, unlike Oblivion? When you meet the members of the Dark Brotherhood, they're actually assassins, not some cheery people that kill people for money. You can actually
feel that they belong there. Same with the Thieves Guild. In Oblivion, they were all so cheery, now they seem dark and only care about the job at hand; Getting money. In Oblivion, they were like, "Oh we're going to steal this! YAY! We're so good! Pat yourself on the back for a job well done!"