I chose Stormcloaks, after all, I am a Nord, I see the big, bloated, weak, failing, elf tools over there, or the Nords, fighting for their own land, the right to their beliefs, and fighting an influx through the Empire's outposts of Altmer constantly funneling in war materials, if we don't close the gap Skyrim is lost, letting the Empire stay, is like leaving a gaping hole in a boat, and saying "It was built that way, so it should stay that way!" and letting the boat sink the moment it leaves shallow waters.
All this talk about a united empire being stronger, PAH you think a united empire is stronger only due to numbers and the security therein, not realizing that a "United" empire is so full of holes, already entirely subjugated entirely by the elves, if Skyrim goes to the empire, and the war resumes, every outpost in Skyrim will have an elven presense in it already, and BAM war over! with the stormcloaks we prepare for war, we see the dominion cast out entirely, and when the elves decide to try and fight us, let them come! At least this way they'll hafta come in from outside skyrim, not already have a foothold of serious strength in place from the get go!
Not to mention, who wants to be part of the legion, they all look the same, they rarely get any recognition, and they've REJECTED their roots!
All the silly in character nationalism aside, I do think the empire is the worst possible choice, everything they stand for at this point is broken, their system is falling apart.
I mean, being forced to reject one of your gods "Because he was a mere human!" is pretty big racist bs on the Dominion side of stuff, it's like saying if you aren't altmer you aren't worthy of godhood, so we'll just pretend you didn't happen...