PS1: CDs were cool, the controller was great, the 3D graphics evolution, 2D graphic advancements over previous gen, great JRPGS, new IPs
PS3: powerful system, high quality build, XMB, apps, digital library, mulitmedia, new IPs, great shooters, great WRPGS, trophies, PS Plus
PS Vita: powerful system, high quality build, even more apps, cross controller, cross platform, cross save, cross buy, dual analogs, PS Plus, trophies, full digital library, PS Mobile, new IPs
Before the PS3 everyone was nice to me :(