I loved Prime 1.
Actually imported an American Gamecube to Europe to play it earlier.
Didn't love Prime 2 so much, never even finished it.
Totally fell in Love with Prime 3 again.
I like the direction they took with smaller worlds, while delivering the classic Metroid flavor.
And I've always loved, adored, admired and worshipped Retro's art design.
But with Prime 3 the art-team again outdoes it's self.
Such amazing, imaginative and unique world they built. Simply beautiful.