Both factions can go die in a fire as far as I'm concerned, but if I had to choose one I would have to go with the Emire. There is just something about Ulfric Stormcloak himself that I just viscerally hate.
So you hate the whole empire but because of one man that could easily be toppled if he was found false in the end you'll damn the whole people for wanting freedom to not be dragged off tortured and killed for thier peaceful beliefs? Sounds fair.
Obviously stormcloaks here, but as above even if any truth comes of what people have read into him comes up the army or most of it could at least dethrone him, of the dragonborn could with a shout that actually tears him to pieces. But for the most part I don't see much truth to the claims of racism and suppression on him part, just a bunch of whiney refugees that destroyed one land and won't lift a finger to save the one sheltering them from that fallout, not even lifting a finger to benefit themselves, just complain and tarnish everyone in a city for not being given a palace each to live in. Yes lady the argornians live down by the water, because they like it. And yes the third of a city you where given is in a bit of disrepair, like the rest of the city is, look that the wheather around you it's not good for ancient stone work, but it's huge and standing and the insult of a name is one I see more evidence you gave it yourself then anyone else as an insult much like how you call your inn a corner club like in isn't a good enough word for you, now stop your whinging for not being treated as a lord when you fled here and take a leaf out of the FAMOUS WELL OFF alchemist...who guess what..is a DARK ELF, a nice home/shop he has too better then most of the other shop keepers, book. Or maybe a leaf out of the book of the HIGH ELF that has moved from the home of the THALMOR and is now doing rather well and made themself useful and connected.
I want and think it should be choosen as canon because, well the empire has had thier run been done now, time for something new be it independant countries or a new ruler, plus I don't think the plan of the empire waiting out to be stronger would or should work out of them, they are becoming weaker and more corrupt for it, more hated and letting or helping the potential allies be killed normally with way to much enthusiasm, the thalmor are weak and spread thin right now, given time like the empire wants they'll grow strong and be firmly placed and running everywhere where all those who may oppose them outside the empire dead others who might have converted and the rest just well paid off enough to not want to go against them.