I start off by naming all the consoles that I have owned and I will state whether I still own it or sold.Include years you owned it beside it as well if you can remember.

My consoles I have owned during my life

Sega Master System 2 (1991 to 1993) = sold

SNES (1995 to 1996)= sold

PS1 (1996 to 1997) = sold

N64 (1997 to 2000) = sold

XBox (2005 to 2006) = sold

XBox 360 (2006 to ....) = I currently own two XBox 360s

Atari of some kind (parents sorta were the owners but I was the only one who played it, so yeah)
NES
SNES
N64
PS1
PS2
PS3
Wii

Atari 2600
comodor 64
amiga 600
sega genesis
PS1
Xbox
PS3

Never sold a system. Here's what I got:
SNES (1998)
GBC (1999)
N64 (2000)
GBA (2001)
GC (2003)
Wii (2007)
PS1 (2007)
360 (2008)

NES
Genesis
SNES
3D0
N64
PS1
Dreamcast
Gamecube
PS2
Xbox
Nintendo Wii
Xbox 360
PS3

Those are my consoles. I try and play everything good every generation.

Oh, if we count handhelds, then:

Gamegear
Gameboy
Gameboy Pocket
Gameboy color
Gameboy Advanced
Gameboy Advanced SP
Gameboy Advanced micro
Nintendo DS
PSP
Nintendo DS lite

Atari 2600
NES
SNES
PS1
PS2
Xbox 360
PS3

Atari 2600
NES (x2)
SNES
N64 (x2)
Gamecube
Wii
Sega Genesis
Playstation (x3)
Playstation 2 (x2)
Playstation 3
XBox360

I still own all of them, along with their games.

2 Super nintendos
2 Sega mega drive
Nintendo 64
Ps1
Ps2
Ps3

no body owned comodor 64 or amiga?

Super nes = lost
Sega genesis
Playstation
Playstation 2
Pstwo
Gamecube = sold
Playstation 3
Xbox360 = tryin to sell it

GB pocket = lost
GB color = lost
GB advance SP = sold
DS phat = sold
DS lite = tryin to sell it
PSP