I play both sides happily. The usual way we have of choosing is to place a movement dial for each side in a hand and then the other picks a hand, and then we choose our repesctive forces. Makes for a great random matchup.
That's a pretty cool way to decide sides, Aridia! I like it.
I fly both, as I love the game too much to limit myself to one side or the other. That being said, my 7 yr old plays with me, and he LOVES the Empire and all their ships. I fly Rebels a lot. :-)