What are, in your opinion, the most beautiful games? It's not only about eye candy, but design, art direction and the effort put into a game to make it great, too. My choices are:
Atari 2600 - H.E.R.O., Pitfall, most activision games
NES - Castlevania, SMB 3
SNES - Bahamut Lagoon, FF III, Valken
N64 - Starfox 64, Zelda: Ocarina of Time
GC - Viewtiful Joe, Metroid Prime, Resident Evil 0, Mario Sunshine
SMS - R-Type, Golvelius
Genesis - Gunstar Heroes, Sonic Series
Saturn - Panzer Dragoon series, Nights
Dreamcast - Shenmue, Ikaruga, Skies of Arcadia
Xbox - Panzer Dragoon Orta, Halo 2 (not yet released but looks great)
PS - Star Ocean, FF9