Is this implying only Sony systems?

PSX:

Castlevania: Symphony of the Night - Gave me the model of what I thought Action/RPG hybrids should be.  Sadly, I never saw another game surpass it in ideas or detail until Muramasa on the Wii.

Suikoden II: One of the most complete JRPGs I had ever played and one of the few to actually make a compelling game focused on the story, this was one of the best games on Playstation.

PS2:

Dragon Quest VIII: Without question, the best game I played on the PS2.  The most polished and gave me the most playtime.  But most of all, it was just the most fun.  One of the best games I had ever played and influenced my view of JRPGs greatly.

PS3:

Don't own one yet so can't comment.

PS1 era - Resident Evil, Suikoden, Tekken

PS2 era - Devil May Cry, ICO, Shadow of the Colossus

PS3 era - Uncharted 2, LittleBigPlanet

...you mean like how you think life?

None.

Shadow of the Colossus changed the way I look at narrative in video games and redefined the relationship between a player and the part he plays.

PS1: Final Fantasy VII (lived up to every expectation I had), Dracula X (nice surprise, never been into the series), Tekken 3 (unexpected near-perfect arcade port).

PS2: Final Fantasy X (amazing battle system), Tekken Tag Tournament (better than arcade just like Namco did to Dreamcast's Soul Calibur).

PS3: Final Fantasy XIII (most beautiful graphics in a game I've seen to date), God of War III (I'm still speechless, it's a simply unique experience).

PS1: XENOGEARS (Greatest RPG ever made), Star Ocean: The Second Story (Didn't even like RPG's before this game), Spyro the Dragon, Tomba!, Suikoden 2, FF9, Soul Blade, Street Fighter Alpha 3, Kartia, X-Men Vs. Street Fighter, Monster Rancher 2

PS2: Shadow of the Colossus, ICO, Shadow of Destiny, ZOE 1 & 2, Kingdom Hearts 1 and 2, Marvel Vs. Capcom 2, GTA: San Andreas, Spiderman 2

PS3: COD 4 (Couldn't stand FPS games before this), Valkyria Chronicles, Heavy Rain, MGS 4

I'm guessing on Playstation consoles only:

PS1: MGS, FFVII, Tekken 3, Tomb Raider, Resident Evil, Silent Hill

PS2: GTA III series, MGS3, Timesplitters, Shadow of the Colossus

PS3: Uncharted 2, MGS4, Heavy Rain, Mirror's Edge, Assasin's Creed 2,

Oblivion, Fallout 3 (Both played on PC)

PSP: FFVII: Crisis Core

Mine would have to be

WCW MAYHEM

SMACKDOWN!