Eh fun topic, I have blown a silly amount of time/money on my collection!
4 x Genesis(all models,1 m2 box), Sega CD (model 1 boxed), 32X(boxed), 3 x Saturn (model 1,2,Japan,netlinks, boxed with phone line simulators), 2 x Dreamcast, NES, SNES (box), N64, 2 x Virtual Boy(US and Japan, boxed), Gameboy pocket, DS, Wii(box), Switch(box), 2 x Xbox, Xbox 360, Atari 2600(4 switch), ST1040, Lynx (box), Intellivision(box), C64C(box), Apple IIc, Macintosh SE, NEC Turbo DUO(R? boxed), 3D0 Goldstar, Timex Sinclair 1000, ZX Spectrum 2+(box), Tiger game.com (box), Vectrex(boxed), Videoton TV-Home Computer 64K(rare, thanks Jubatian), Enterprise 128(rare, thanks Jubatian)...man there is several more I can't remember now and had to stop collecting until I get a bigger place. Almost no games for certain systems, but tracked down flash multicarts for most of those.
RetroWiz, BitBox, 6+ Uzebox, EUzebox, Uzebox JAMMA,...if anything mostly an Uzebox guy. Just wanted to get the rarer classic machines in case I retire and have time to play with them all some day
Thinking on Wonderswan lately, they seem pretty interesting.