Damn, I finished MGS1 but never the second nor the third one... (but finished MGS2 demo multiple times). You made me want to try again. Are MGS2/3 available on PS4?
Also, I tried MGS4 and it was just too cheesy to me. The intro of MGS5 was just too long and boring so I just gave up... so I'm not sure if I grew out of these types of games or if I should have tried harder.