I'm a big fan of the series... I never finished the SNES version, played SF 64 on an emulator with a gamepad and back when I had a gamecube ayed about half of SF : Adventures then I bought Star Fox Assault... Awesome game. Never played the Nintendo DS one...
Star fox is known for it's easter eggs, the secret levels etc... For example, there's a different ending (the canon one) that can only be reached by completing the hard route which includes a (and the single level in the whole series) level where you use the Aqua blue (I think that's it's name. ). A submarine which fires bombs, it's Star Fox'smost powerful vehicle.
I've been waiting for years for a Wii release. Nintendo's launching a SF 64 remake for the 3DS later this year.