Great list! Lots of awesome moments!
One badass moment that I'd definitely include in the top 10 is one that's often overlooked:
When Han is being tortured on Cloud City Lando and Boba Fett wait outside the door. Lando is obviously unhappy and glares at Fett from two feet away. Fett casually turns and meets Lando's gaze, and stares him down *while wearing a helmet*. Lando turns away first. An awesome moment for Boba Fett!
Some others:
1. Vader talking to holograms of Star Destroyer captains in the asteroid field. While Vader is speaking, the bridge of a Star Destroyer is obliterated by an asteroid. The captain screams and his hologram winks out and *Vader doesn't even pause his sentence* to acknowledge that a high ranking officer and entire ship were lost. That's cold....
2. Vader fighting Luke one handed during the beginning of their ESB lightsaber duel.
3. Han shooting the Stormtrooper in the face on Endor.
4. Lando navigating the Millenium Falcon at full speed through Millenium Falcon-sized cracks in the second Death Star.
5. The crack shot AT-AT driver who takes out that fast moving snowspeeder right before aiming at Hoth's shield generators.
6. Luke taking down an entire AT-AT on foot.
7. Anakin's no-look over-the-back lightsaber deflection of the blaster bolt in the Mustafar bunker right before he turns his Sith eyes to the camera.
8. Anakin jumping off the structure going over the lava waterfall and landing on the tiny lava droid.