They said your available classes will be determined by your current faction standing with any particular class. So if you started off as a paladin you won't be able to mix your Paladin with a rogue or sk,necro etc. To be a paladin you would of have to of done good things for npc quests choices. To be a rogue you would of had to do sinister stuff and to be evil well you get the idea. Your fotm class choice will be determined by what you do everyday in the game. Go kill guards to your starting city and you won't be able to stay as a paladin and vise versa.