No, no, no. They won't blast a hole in your chest. What do you think they have interrogator droids for, anyway? At least take heart in the fact that you won't remember anything afterward.
Anyway...I think that the Rebel Alliance is much more complex to play, especially because of raid fleets and other little tricks like that. The Imperials, on the other hand, are just very cool to play. I love arriving in a system with Star Destroyers or dropping AT-ATs on the ground.