This game is totally awesome and is extremely open ended.
There are many guilds for you to join such as the assassins guild ( morag tong), fighters guild, mages guild, and imperial guilds, as well as great house guilds. Each quest line takes around 10 hours to complete. The one flaw about the game being so large is how hard it is to locate the area of your quest. Sometimes the game lags and sometimes your guy misses the enemy which can get really frustrating. The assassins guild is probably one of the cooler guilds, but you can't freelance again until you have become grandmaster of the assassins guild. Why you may ask? The assassins guild will start sending out people to kill you if you freelance too often. Skills like sneak take a long time to train and enchantments cost too much money. For the enchantments, it's not just do one quest, enchant one item. It's more like do 7 quests enchant one item. This is a very good game, and I recommend it to anyone who is a fan of RPG's. It isn't quite oblivion, but it's pretty close.