Sadly I don't have any PlayStation consoles at the moment, but I'm hoping to change that soon. After all, throughout my teens and early adulthood the consoles were my main medium for gaming. So being that I've been a fan for so long, I do have some favorites.
The games that I would play the most across all consoles, PlayStations 1/2/3, were the Metal Gear Solid games. Metal Gear Solid was the first 3D game to truly impress me with its graphics and gameplay, and the trend continued with each new installment. I still play the original now and again through an emulator, and the sequels too if I can get them to work.