I can only do a Top 5:

5. Nintendo DS

4. PS2

3. SNES

2. PS3

1. PS1

(0. PC ) Can't really be compared to consoles, but I had to mention it.

Yeah - I'm a Playstation guy. Weirdly, the most successful PS-console is my least favourite one and with a few more years on the market the PS3 might even surpass the PS1, which would mean that my appreciation for a system is inverse to its success and therefore general taste.

10: Xbox360

9: Dreamcast

8: Wii

7: NDS

6: NES

5: Megadrive

4: SNES

3: N64

2: Gameboy

1: PC

10. Dreamcast

9. Xbox 360

8. Gameboy Colour

7. Gamecube

6. Nintendo DS

5. Playstation 2

4. Playstation

3. Nintendo Wii

2. Nintendo 64

1. SNES

1. Xbox 360

2. Playstation 3

3. Xbox

4. Playstation 2

5. Nintendo 64

6. Gameboy Advanced SP 

7. Playstation

8. Nintendo DS

9. Nintendo Wii

10.  Sega Genesis

And  that is every console and handheld system i have ever played.

My list (I don't have/had all this stuff, I just had oppirtunity to play on it):

10. my boyfriends' nevres :D
9. Commodore
8. Amiga
7. Atari
6. DS
5. Xbox 360
4. PS3
3. PSP
2. Wii
1. PC

1. SEGA Saturn

2. Super Nintendo

3. SEGA Genesis

4. Nintendo 64

5. Atari 2600

6. Playstation

7. Nintendo Entertainment System

8. Gamecube

9. Game Boy

10.  Playstation 2

10.    PS1

9.     Wii

8.     N64   

7.     PS3

6.     Gamecube

5.     GBA SP

4.     Genesis

3.     DS Lite

2.     SNES

1.     NES

10.Xbox

9. PSP

8. X360

7. PS3

6. SNES

5. Dreamcast

4. Genesis

3. Saturn

2. PS1

1. PS2

1) Dreamcast

2) Lynx

3) Turbografx 16

4) Virtual Boy

5) Sega Saturn

6) Game Gear

7) N-Gage

8) 3D0

9) 32x

10) Zeebo

10-... Virtual Boy

9- Game Boy

8- Nintendo Entertainment System

7- Game Boy Advance

6- PC

5- Nintendo DS

4- Nintendo 64

3- Super Nintendo Entertainment System

2- Wii

1- Nintendo Gamecube