My favorite has always been Star Wars Rebellion.
http://en.wikipedia.org/wiki/Star_Wars:_Rebellion
and the Original Star Wars Galaxies (Pre-Combat Upgrade)
http://en.wikipedia.org/wiki/Star_Wars_Galaxies
followed by Star Wars: Empire at War (which was based off Rebellion)
http://en.wikipedia.org/wiki/Star_Wars:_Empire_at_War
I also liked the old Star Wars Arcade game. There is emulator for it so you can play it on the PC.
http://en.wikipedia.org/wiki/Star_Wars_(arcade_game))