Best
PS1, PS2, and NES

Worst
Wii

1. Gamecube, dont really see the hate (Baten Kaitos)
2. PS3 (library really stands out)
3. DS (Phoenix Wright has changed my life)

Worst
None really but for the most part my Xbox 360 not because the library was bad but because I got RROD 3x and was done and fed up with it, which is a real shame because the library rivals the ps3 and would be my number 2 (tied) if the hardware didnt suck (IMO)

In no order:

SNES
PS3
N64

The worst would have to be the N-Gage and the Wii.

My Top 3:

PS2
PS3
PS1

I've never owned a bad system because I would've not had bought it in the first place if I wasn't gonna build a library for the system.

I've owned so far, Gameboy, Gameboy Colour, Gameboy Advance, Gameboy SP, DS, DS Lite, Nintendo 64, Gamecube, Wii, PS1, PS2, PS3 and PSP.

Favourites in order from first to third;

PS3 - This is my first probably because i am in my teens and the games just seem to mean more at my age than they did at a younger age. I pour so much time and money into it.

N64 - The very first game system i had, got it when i was about 4-6. Absolutely loved the games, especially paper mario, banjo kazooie/tooie and mario 64.

PS2 - Didn't really get into the hardcore games as i was till at a young age when i got this probably 8-9. The standouts of this system were fifa 06 and the need for speed series, starting with hot pursuit 2 and ending with most wanted.

Most disliked system.

PS2 - I loved my N64 and we traded it in when we got the ps2

Favorites:
PS3
N64
PSOne

Worst:
NDS-All the games I wanted for it turned out to be kind of sucky, so now it is just collecting dust.
360-The only way I am able to connect to the internet is through wireless. I dont like buying accessories for something that should already be available and even if I could connect, I wouldnt pay for Live. A 360 with no online is kinda meh.

Best:
1: PS3
2: PS2
3: PC..? Its a gaming system xDD

Worst:
1: X360 (Personal taste I guess, only got Halo 3 & Gears 2 and I dont really feel like it was worth the money, used it a total of 5 times over the past 1,5 years now. Get most PC/X360 games on the PC so...)

Top 3:

-PS2

-PS3

-PS1

Worst system owned is a bit harsh as all have served me well...here goes:

-N64

favorites:

1)dreamcast (sonic adventure 1,2 power stone 1,2 shenmue 1,2 jet set radio, soul calibur, crazy taxi and more.. (Subarashii)
2)xbox360 (gears of war 1,2 halo 3, left 4 dead, lost odyssey...)
3)nds (well you can play all the pokemon's in it :P) (main ones) also mario kart ds is very good

hated ones that I have (or had):

not in order... wii (boring all the way up) psp (only 2 or 3 games ok the rest are ports -.-) ps2 (only kingdom hearts 1,2 and persona 3 (fes),4 were time worthy for me)

Top 3:
SNES
Sega Saturn
360
(honorable mention: Sega Genesis)

Worst: Hard to choose between these two, so I'll go with a tie between the PS3 and the 32X.