Really tough to say....so I'll name my 5 favorites (in no particular order
) of every system I owned/played.
NES-Super Mario Bros. 3
-Kirby's Adventure
-Final Fantasy III
-Duck Hunt
-Crystalis
-The Magic of Scheherazade
SNES-Super Mario World
-Chrono Trigger
-Final Fantasy VI
-Super Mario RPG
-Kirby's Super Star
N64-Super Mario 64
-Banjo Kazooie
-Banjo Tooie
-Donkey Kong 64
-Mario Kart 64
GCN-Super Smash Bros. Melee
-Sonic Adventure 2 Battle
-The Legend of Zelda Twilight Princess
-Soul Calibur II
-Super Mario Sunshine
Wii-Super Mario Galaxy
-Super Mario Galaxy 2
-Super Smash Bros Brawl
-Dragon Ball Z Budokai Tenkaichi 3
-The Legend of Zelda Skyward Sword
GB/C-Super Mario Land 2 Six Golden Coins
-The Legend of Zelda Link's Awakening DX
-Final Fantasy Legend III
-Azure Dreams
-Pokemon Crystal
GBA-Pokemon Emerald
-Breath of Fire II
-Advance Wars
-Final Fantasy I & II Dawn of Souls
-Final Fantasy Tactics Advance
NDS-Yoshi's Island DS
-Pokemon Black/White 1
-Kingdom Hearts 358/2 Days
-Kirby's Squeak Squad
-Kirby's Super Star Ultra
3DS (Not enough to consider....but guess I'll post the few )-Bravely Default
-Super Mario 3D Land
-Pokemon X
PSX-Final Fantasy VII
-Final Fantasy IX
-Final Fantasy Tactics
-Tales of Phantasia
-Final Fantasy Chronicles
PS2-Kingdom Hearts II
-Star Ocean Till the End of Time
-Final Fantasy X
-Grand Theft Auto San Andreas
-Disgaea Hour of Darkness
PS3 (not that many either )-Final Fantasy XIII-2
-Ico & Shadow of Colossus Collection
-Ni No Kuni Wrath of the White Witch
-Tekken Tag Tournament 2
-Devil May Cry 4
PSP-Final Fantasy Dissidia
-Final Fantasy VII Crisis Core
-Kingdom Hearts Birth By Sleep
-Jeanne D' Arc
-Persona 3 Portable
SGEN-Streets of Rage 1
-Sonic the Hedgehog 1
-Sonic the Hedgehog 3
-Shining Force 1
-Shining Force 2
PC-Left 4 Dead 2
-Assassin's Creed II Deluxe Edition
-Portal 2
-Saints Row The Third
-Ys Origin