Atari 7200
Atari 2600
Nintendo
Turbografx 16
Gameboy
Super Nintendo
Gameboy Advance
Nintendo 64
Playstation
Gamecube
Playstation 2
Xbox
Playstation 2 Slim
PSP
Playstation 3 (3 different ones)
Xbox 360 (2 different ones)
Playstation Vita

Future consoles
PS4
Xbox One
Wii U

Gen 2, Atari 2600, Intellivsion, Coleco Gemini (2600 clone)
Gen 3, NES, Sega Master System
Gen 4, SNES, Sega Genesis
Gen 5, N64, Sega Saturn, Playstation
Gen 6, Gamecube, PS2, Xbox, Dreamcast
Gen 7, Wii, Xbox 360, PS3
Gen 8, Wii U, (PS4 soon)

Handhelds
Gameboy, Gameboy Colour, Sega Gamegear, GBA, PSP, DS (and DSi), 3DS, PS Vita

Only NIntendo up until 2011, when I got a PS3. It was an amazing year.

I've owned the following:

Gameboy
Gameboy Color
DS
3ds
Gamecube gameboy advanced adaptor
SNES
N64
Gamecube
Wii
360
WiiU

I sold the 360 in for credit to get my Wii U so other than that I've had all Nintendo consoles only. I will never buy a microsoft or sony console or any other brand unless Nintendo goes 3rd party (not gonna happen).

PC gaming is the only non Nintendo gaming I do really. I've had my fill of fps based consoles and won't be returning to a call of duty box or a kill zone playstation.

PS1
PS2
PS3
PSP
Game Boy Color
Game Boy Advance
Nintendo DSi
SNES
N64
Xbox
Sega Megadrive

In order of purchased

- Sega Master System
- Sony PS1
- Sega Dreamcast
- Sony PS2
- Microsoft Xbox
- Sony PSP 1000
- Nintendo Gamecube
- Sony PS3
- Nintendo Wii
- Sony PSP Go
- Sega Genesis
- Sega Saturn
- Sony PS Vita
- Sony PS4

Favorite all time console - Sega Dreamcast

at home (consoles + computers):

Atari 2600 (borrowed for a few weeks)
C64
Amiga
PC (main platform since then)
SNES (borrowed for a few weeks)
PS1
N64
PS2 (borrowed for a few weeks)
Xbox
GameCube
Xbox360
Wii
PS3

preordered:

WiiU (Wind Waker HD Edition)
PS4 (with DriveClub)

mobile:

Game Boy Color
GBA SP
PSP
NDS Lite
iPad
PSVita
3DS XL

NES
SNES
N64
GCN
Wii
WiiU
PS3 Slim
PS3 Super Slim

Handhelds:
Game Boy
Game Boy Color
Game Boy Advance
Game Boy Advance SP
DS Lite
3DS
3DS XL
PSP

- Odyssey2 (G7000)
- Atari 2600
(both ODY2 and A2600 before my time, but still have them)
 - NES
(NES partly before my time, but still have it)
 - SNES
- GameBoy
- N64 3x
- PlayStation
- (GameBoy Pocket)
- (GameBoy Color)
- Dreamcast 2x
- GameCube
- GameBoy Advance
(NOTE; the 6th Gen I also played a lot on my cousin's XBox, but was mostly a PC gamer)
- PlayStation 3
- Wii
- DS
- Genesis (Mega Drive)
(decided to get the GEN generations later because a friend had it back in the day, memories were attached)
 - 3DS
- Color TV-Game 15 (yes, no joke)
(got a version of Nintendo's 1977 Pong Console to complete the Nintendo console line, only need a Game&Watch and the Virtual Boy to truly complete it)
 - WiiU
- PlayStation 4 potentially

I personally started gaming at the very tail end of the NES's (European) life, though I don't remember the SNES being released. The N64 and Dreamcast are the only two consoles which I got multiple times. No console ever broke, I got those three and two times respectively because I wanted to play them 'in every house' (meaning here at home, at my father's house and at my grandma's). The GameBoy is the only console I got redesigns for, the Pocket and a little later the Color.

I've stayed loyal to Nintendo's consoles since the start, but sought a 'companion' console nearly every time to get 'the best' gaming experience each generation. Only the 3rd and 4th generations are exceptions, in these eras I didn't have influence on purchases because I was still very young. These generations have only the Nintendo console.

Still have everything I mentioned, even the oldest two (boxed as well) which were my mother's in her youth. She had more, but I'm not sure what exactly, I know there were a couple of Pong-consoles that have sadly been lost over time.

Haha I will have two consoles on my list that noone else posted yet!

Home consoles:
-Pegasus (ask Pezus what is it )
-PS1 (my brother owned it, but it was in the household)
-PS2 (fat & slim quite recently)
-PS3 Slim
-PS4 on preorder

Handhelds:
-GameBoy Color
-GameBoy Advance
-Nokia N-Gage QD (and I loved it, bite me ;-P TES Travels Shadowkey FTW!)
-PSP

PSVita in the near future.