I gave my votes to:
Nintendo Entertainment System (NES)/Famicom (FC)/Famicom Disk System (FDS)
Super Nintendo/Super Famicom
TurboGrafx-16/PC-Engine/Turbo CD/PC-Engine CD-ROM/Turbo Express/PC-Engine GT
Actually the video game system(s) I truly owned (used many years of saved up my pocket money to buy) before were:
Famicom + Famicom Disk System (FDS) (8-bit)
And I got a Super Famicom (16-bit)
as a birthday gift from a rich relative.
For all other ones, either I could only try some (i.e. PS 1&2) at friends' places or just had no access to those at all....