I'd put my vote in for "Episode 1: Racer" for PC.. Pod Racing at it's finest. The graphics are kicking for an old game... Rogue Squadron 3D for PC has some pretty good missions and isn't bad for graphics if you make your graphics card do all the work instead of keeping the graphics "application controlled".
I still have my Atari 2600 with "The Empire Strikes Back" cartridge.. Those walkers were so blocky! and the snow speeder looks like something you make with lego. Good gameplay though.
"The Best" is kinda misleading... it all depends on what you're in the mood for, and what kinda gameplay you like.