Most of my home consoles are boxed away, but I have;
NES, Mega Drive, Dreamcast, N64, Amiga, PS1, Xbox.
I don't really play modern home consoles but I have a Wii (20 games+15 Virtual Console games) and Xbox (very few games, bought for RockBand 2).
DS+PSP collection. I like my rare(ish) PSP games :3
+15 or so PSN downloaded titles like FF7-9, Pinball Heroes, Williams Pinball Classics, Sega Classics, Rayman etc.
Cupboard where I keep all the important stuff. Old PC game boxes, Gameboy boxes and manuals, Gameboy Advance boxes, accessories.
Gameboy Advance(s) and game collection. My fave console ever this!
Gameboy(s) and game collection. Some rare ones in there. Bought those Zelda Oracle games boxed at a very ace price a couple of years ago. Never used!
My whole Steam library of ~200 games+the entire Mega Drive collection.
my iOS game collection. I don't really see this as a proper gaming platform but it's hard to stay away when games are 59p.
My classic game collection consists of the basics. Mario 1, 3. Sonic 1, 2. Streets of Rage 2... too many to really go into there.
My Amiga collection sits at around 200 games

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+ Some gaming memorabilia; Ambassadors of Funk Mario tape, Street Fighter 2 launch VHS video, Mortal Kombat headband from the developers themselves, some signed games, Dreamcast arcade sticks...
I'd love a SNES with Mario World. That's my
super-realistic-but-can't-be-bothered-to-go-for-just-yet dream.