I have:
NES (
top loader) - I don't know anyone else who has this model.
SNES - Doesn't work to its full capacity (Can't play Kirby Super Star or Super Mario RPG). Would like to get a new SNES.
N64 - I actually have two since my sister just gave me hers when she gave the NES mentioned previously to me.
GCN - Currently not in active use since the Wii does the GCN games just fine.
Wii - Well, I'm playing Super Smash Bros Brawl, aren't I?
PS1 - Modded but don't know what chip was used. Use it for certain burned games. Still kicking.
PS2 - Modded with a DMS Mod Chip. This is what's hooked up and used for both PS1 and PS2 game, imports and domestic.
Xbox - Jet Set Radio Future and Ninja Gaiden were originally what I have the system for. I did get into Halo late so I did use this to catch up.
Xbox 360 - Most active system right now. Still would like to get the save file I can transfer over from my old Xbox to my 360.
Everything except the GCN and PS1 are hooked up.
Handhelds:
2 White brick Game Boys
Silver Game Boy Pocket (one without the light indicator)
Clear purple Game Boy Color
White Regular Game Boy Advance
Limited Edition Pokémon Groudon Game Boy Advance SP
Silver original DS
Game Gear
Black Original PSP.
Uhh...yeah. It's piling up but not a museum.