Oh, I love Impies, but my interest in them didn't blossom until reading The Thrawn Trilogy. Love of boots, English gents, and uniforms aside, I found them fascinating in the EU because you never know what might happen to them. Luke, Leia, Han? They're gonna' be fine. You are not invested in them because they're our heroes - they are not going to die (not for a long while, anyway). However, you are always at the edge of your seat with the Imperials. They could collapse, become injured, or die at any sentence. Their struggles, desires, and actions seem more genuine. They just feel a little more real.