Ps1 for me. Gran Turismo 1&2, MGS, Smackdown, FF7-9, Ridge Racer Racer Type 4, Silent Hill, Resi evil, TOCA, Colin McRae, Syphon filter, ISS Soccer 2, dino crisis, vagrant story, Tenchu 2, front mission 3, klonoa, Driver 1&2, Tony Hawks 1&2, Spyro, Grandia, Tomb Raider, oddworld, crash bandicoot, soul reaver, v-rally, tekken, wipeout, PaRappa........sooo many awesome memories. Probably bucket loads I can't remember too.
GameCube in a close second.
I'd love a new klonoa or dino crisis on ps4.