Having this kind of influence, choice, and diversity in tasks after the main quest would be priceless in my opinion. I would love to be able to control an army of Imperial Guards as the Knight of the Imperial Dragon to maintain order and stability in the Empire.

I would love to be able to go on crusades with the Knights of the Nine (after the main quest is done) and bring faith and justice to those who have none (the orc knight makes a gesture of going to Morrowind due to their daedric worshiping). I would love the option to revert and overrule that law and allow necromancy. For example, the Arch-mage in Oblivion banned any use of necromancy whatsoever before you join the Mages Guild. Both are attractive to me because they offer skill lines. Once you get to the top of your guild, you should have true influence and power. So I'm debating my next DLC purchase and stuck between Thieves Guild and Dark Brotherhood (maybe one day down the line I'll get both, but since I'm a filthy casual right now, I'm only going with one). but dissappointed by the contenuing missions for the brotherhood i talked to the same dude 3 times in a row for. I also don't want the meaningless tasks (at least not the repetitive tasks of go here and kill these npcs) that were given in Oblivion to try and maintain interest. i havent finished the thievs guild quest but so far id call it a tie between dark brotherhood and companion quest i loved it when the emperor asks you to take out whats his face who wanted him dead. I don't want to just go all the way to the top again (like I have done in Morrowind and Oblivion) only to realize once I'm there, that's it. I agree that TES needs to give more longevity and benefits to being in the guilds (the main quests will definitely be completely new as they always are). First of all, bring back more factions like Morrowind!

Thieves guild or dark brotherhood first