I have to go for Sony.
I grew up with a SNES and Gameboys, but when a game left its mark on me, it was a PS game most of the time.
Silent Hill 1, 2, 3
Final Fantasy IX, X
Uncharted, The Last Of Us
Killzone 2...
Don't worry, I also played games I love on other consoles: Xbox has Halo 2 and Alan Wake, and Nintendo has Pokémon, Fire Emblem, etc...
But overall, my most memorable gaming experiences were on PlayStation.
Just because you have an opinion doesn't mean you are necessarily right.