I keep being tormented by the politics.
It is the return of the Morrowind dilemma all over again--these people believe in me, but what if I am just an Imperial plant? Am I destined to save the world, or just helping the Blades manipulate popular sentiment to undermine the Tribunal and corrupt my people's beliefs in favor of the white-man's false gods (I played only Dunmer). I would end up running Temple, a noble house and Morag Tong, but never far in the main quest line--I actually took up Dagoth Ur's suggestion to come visit and chat--I was unpleasantly surprised, and felt he jumped the gun--I was entirely willing to negotiate on the whole "kill the empire bit"
This is why I hated Oblivion incidentally--why would my dunmer/khajiiti/redguard rogues give a damn about the Emperor? Why would I want to restore my oppressors to their throne? The whole "devils will eat the earth if some pasty Imperial isn't living rich off my ancestral lands" story line never rung true to me.
Which brings me to Skyrim. First I saw the imperial torture chambers, and heard the cries of the proud Nords and thought "Stormcloaks, here I come". Then I got the sense that they weren't too keen on my khajiiti bretheren, nor treated Dunmer refugees with the respect they deserve.
Then came the Blades quest, infiltrating the embassy. I got the dossier on Ulfric.
So basically--go with the noblest feelings and aspirations of the freedom-loving Nord people dooming them to Altmer slavery a generation down the line.
Or.
Go with the Imperial bastards, and sustain their tolerant Pax Romana.
Betray all that is just and side with the lesser evil, for the greater good, or go with your gut and fight for freedom, to place an Altmer plant on the throne and doom the empire to effective enslavement by the most uppity of the mer folk.
Fucking politics.