This isn't really an off-topic topic. That being said, I'll bite.
1. John Williams' score
2. Ewan McGregor
3. Natalie Portman (from certain angles, and when she isn't talking)
4. Darth Maul
5. Maul's lightsaber
6. Ian McDiarmid pre-POWA!
7. The idea that the Jedi aren't perfect
8. Jango's armour
9. The idea of Dooku; Dooku the character sucked, though
10. Mace Windu's lightsaber
11. Grevious' design
12. That Anakin held onto his blue lightsaber after siding with Palpatine
and used it against Obi-Wan in their duel instead of immediately
replacing it with a red one