Here's all the games:
StarFox (SNES) was good. Though it has aged.
StarFox 64 was just a great classic. Best in the series.
StarFox Adventures was the 'black sheep'. It's "okay" for what it is, but it's not a StarFox game.
StarFox: Assault (GCN) was meh.
StarFox Command (DS) was decent.
And StarFox 64 3D is simply a remake.