I have a soft spot for Shadows of the Empire on N64. Not amazing, but it takes me back.
Rogue Leader is one of the best, and it still looks pretty good almost a decade later. Then again, there's that damn frigate captain lady...
The Battlefront games are okay, mostly for parties, though. Same for Galactic Battlegrounds.
The Jedi Knight games were okay, and I had fun with KOTOR for a while.