Number 10:
10: Master Sifo Dias. I've explained about that one twice before.
9: Leia Organa, sound good enough.
8: Yoda.
7: Luke Skywalker, now I never liked his name because it was too "earth-like", but ah... It's Luke!
6: C3PO, sounds good, and it's an easy name to remember.
5: R2D2, same as threepio.
4: Han Solo
3: Darth Vader. Need I say more?
2: Qui-Gon Jin. It sounds great.
And in 1: Obi-Wan Kenobi - God only knows how he came up with this...!
Ten worst
10: Chewbacca. Nothing against the character! It's the name I dislike.
9: Anakin Skywalker, since ROTJ, I never liked that name
8: Watto.
7: Panaka. I've also mentioned this one before. It means "jerk", "idiot" in portuguese (c instead of k).
6: Biggs. Sounds like a british pilot from the WW1.
5: Porkins. Oh come ON!
4: Mon Mothma. What?
3: Mon Calamari. Oh, right, calamari. Very funny.
2: Shmi Skywalker. "Hello. My name is Shmi!" - "God bless you."
And the worst, at number 1: Jar Jar Binks. Although it WAS created by his infant child.