That's a good collection.
From Nintendo I have an NES, a toploader NES, SNES, SNES Jr., N64, GameCube (w/ GameBoy Player), Wii (w/ GC support & homebrewed), Wii U (also homebrewed), GameBoy, GameBoy Pocket, GameBoy Color (in both Atomic Purple and the yellow & blue Pokemon edition), GBA, GBA SP (limited NES edition!), GB micro (w/ famicon faceplate), DS, DSi, 3DS, New 3DS (with pokemon blue covers), and a Switch.
From SEGA, I have a Master System, Genesis 1, Genesis 2, Sega CD (hooked up to the Genesis 2), 32X (also attached to the Genesis 2), a Power Base Converter (in the Genesis 1), Saturn, Dreamcast, Game Gear, and Nomad. And something called an IR 7000.
From Sony, I have a PS2, PS3 (w/ backwards compatibility), PS4, PSPGo, and a Vita.
From MS I have the first two Xboxes.
I gots a lots.
Edit: An an NES Mini, Famicom Mini, SNES Mini, and do we wanna count the Pokemon Pikachu 1 and 2?
I have since added a second SNES mini, a Super Famicom, a Genesis mini, and a SEGA CDX, which is a Genesis and SEGA CD in a single unit. I also forgot to mention the golden Pikachu & Pichu Game Boy Color last time, as well as the second original model GBA and the second, golden N64.