3: NES
4: Mega Drive
5: PS1
6: / (hadn't any console)
7: PS3
8: Switch

3rd: NES (owned NES and Gameboy)

4th: SNES 

5th: PlayStation (owned N64 and PS1)

6th: PlayStation 2 (owned PS2, Dreamcast, GameCube, GBA)

7th: Xbox 360 (Owned 360, PS3, Wii, PSP, DS)

8th: Xbox One (Owned Vita, 3DS, PS4, XBO, Wii U, Ouya)

Switch: Switch (owned Switch)

4. SNES
5. PS1
6. Xbox
7, Xbox 360
8. Wii U/Switch

The Nintendo ones.

1. N/A

2. colecovision

3. NES

4. Super NES

5. Nintendo 64

6. PlayStation 2, Gamecube close second.

7. Xbox 360.

8. Switch

5th gen: PlayStation

6th gen: PlayStation 2

7th gen: Xbox 360

8th gen: PlayStation 4

9th gen: TBD

Gen 1: N/A
Gen 2: N/A
Gen 3: NES
Gen 4: SNES
Gen 5: PS1
Gen 6: PS2
Gen 7: PS3
Gen 8: PS4

Sega Master System
SNES
SEGA Saturn
Dreamcast (also my fave of all time0
360/PS3 are tied
PS4/Switch are tied

Handhelds.
Game Gear/Nomad
Neo Geo Pocket Color
PSP
PSVita

NES
Super Nintendo
N64 (mostly nostalgia for this one)
PS2
PS3
PS4 till the Switch came out. Switch is currently my primary console, with PS4 being my secondary.

1. never played any of them though the color TV game line was the best selling console for this gen and it was Nintendo's entrance to the console market.
2. atari 2600/game and watch
3. NES
4. SNES
5. N64
6. Gamecube
7. Wii/DS
8. Switch