Well... if you except the very bad start with them (we're like, what, two seconds short of losing our head?), gotta admit the stormcloaks are way more vindictive and xenophobic than the imperials. That and dragons are not any less hazardous for health...
I got to admit I'm 100 hours in the game, yet I haven't seen him again since Helgen. I'm basing my opinions mostly on hearsay and how both imperials and stormcloaks behave. Besides, their claim hold no water, the Forsworn have a better one in that regard.
Yeah. I got a bit sidetracked by all these side quests

Talking about that, I'm a bit miffed by something I missed: I was happily walking (not horse yet then) up some road in the midst of a forest. It was night, and the moons hanged ominously above me... and from up the road, there's a ghost rider (I mean a guy with his horse, ethereal) that rushed down on me. Was kindda unexpected and he popped out from behind the cliff's top, so I had only half unsheathed my weapon that he was already on top of me... excepted that he didn't stop, and for half a second the "talk to..." option flashed on my screen. Damn! I was supposed to talk to him :/ (when he passed by at full gallop ><). Reloading my save, he didn't show up at all. What was that about?
Lol, can't say, I haven't really paid attention with Alduin flying overhead
