Here is my list in alpha order according to the browse section of the forum (Only listing consoles Ive played/owned. I really dont know much about stuff like the Vectrex, Amiga, etc).
Arcade - Black Tiger
Atari 2600 - Riddle of the Sphinx
Game boy - Kid Icarus : Of myths and monsters
Game boy Advance - DQM Caravan Heart
Game boy Color - Dragon warrior I & II
Gamecube - Zelda, the collector's edition
NES - Battle of Olympus
Nintendo 3DS - Bravely Default
Nintendo 64 - Mario Kart 64
Nintendo DS - Radiant Historia
PC - Everquest!!!!
Playstation - Final fantasy VII
Playstation 2 - Dragon quest VIII
Playstation 3 - Ni no Kuni (This is the top choice of everything)
PSP - God of War : Chains of Olympus
Sega Genesis - Sword of Vermilion
Sega CD - Vay
Sega Master - Phantasy Star
Sega Saturn - Magic knight Rayearth
Super Nintendo - Super Metroid
Turbo Grafx/Duo - Ys Books I & II
Wii - Xenoblade
Xbox - Dungeons and Dragons Heroes
Xbox 360 - Kingdoms of Amalur
There are definitely some amazing titles that I had to skip in order to pick just one per system but this is a pretty accurate list for me.