Wii:9/10
DS: 9/10
Xbox 360 8/10
PSP 7/10
PlayStation 3 8/10
GameCube: 7/10
PlayStation 2: 9/10
PlayStation: 10/10

psp 7/10
ps2 9/10
ps3 9/10

I am LOVING this thread. Always wanted to do this but forgot about it :D
This gen
Wii 7/10
Graphics- 5/10 completely average for a new gen console, but serviceable
1st party games- 10/10 Nintendo's best
3rd party games- 4/10 not too terrible, I think a little bit better than GC, but bad for how Wii is doing
controller- 4/10 honestly I don't like the Wii remote at all :(
success- 10/10 I'm very happy about this, it means Nintendo is guarantee to make a another console.
Price- 4/10 Quite overpriced for what you get Hardware wise IMO

DS 8/10
Graphics- 4.5/10 The 2-d is pretty good, its like like PS1 shiny or Saturn grainy level 2D graphics. 3-d is terrible. Sega Saturn was able to look better- just look at Sonic Jam! I would rather the polygon count be lower but the texture not be so unbearably bad...
1st party games- 8/10 very good at first, mario kart DS is awsome. first party is starting to get low though. Where is new Super Mario World? Where is Super Smash Brothers DS? Where is metroid dread? Where is the top down 3-d legend of zelda link to the past DS remake? Whats available is good though
3rd party games- 6/10 lots of 3rd party DS support, by 95% of it is crap or stuff that I am not interested in at this point... DS is really only good for trips now :(
Price-8/10 $130 is good for a portable system that is good for trips and has (had in the past) good multiplayer games like teris and mario kart.

PSP
Graphics- 9/10 I have thought for quite a while that a portable systems with GC graphics would be as good of graphics as I would need for portables. And PSP comes quite close... 2-d looks very good as well
1st party games- 8/10 DS has had way better support than PSP in the past, but Sony is finally stepping it up with releases like God of War and Patapon and wipeout pulse and Secret Agent Clank
3rd party support- 7/10 Much less support than DS, but quality>quantity. PSP games look much better, and the analog numb is so useful for portable gaming. Also there are lots of GOOD SRPGs for PSP.
Bonus- multimedia +4 This helps PSP, listening to music is a pain but PSP has quality speakers. Movies are high quality if you buy UMDs, and it is easy to download movies/TV shows to watch on the go.
-loading times are annoying
price- 10/10 for what you get PSP is a great value if you plan to use ALL of its features and find the games enjoyable enough to play at home as you wont have time to play all the PSP games that are good and many PSP games arn't very portable.

Older Gens
GC
7/10
I would like to give this a 9 on how much I liked it, but realistically it wasn't that great
graphics-9/10
controller- 10/10 imo
loading times- 10/10
1st parrty games 9/10 imo
3rd party games 2/10... TOS, Sonic, RE4... thats all I can think of that was good... may be monkey ball and viewtiful joe...
price- 10/10 $100 for GC is excellent, though I got it as a gift in 2002 and I bet it cost more then

GBA- didnt like, screen got scrathed into oblivion in about 2 months XD

GBA SP- 9/10 great system, bad L/R buttons, no headphones, very compact/bright with lots of great games.

N64- 10/10
graphics- 10/10 fantastic for its time
1st party games- 10/10 amazingly good
2nd/3rd party- 7/10 Rare did most of the legwork for this, but there were toher good games like space invaders and the vigilante 8 series and the Battle Tanx series.
Controller- 10/10 imo. If you held it right, it was great for 3-d games. It had a "3-d game" way to hold it and a "2-d or 2.5d" way to hold it. You could only hit the L button when in 2-d mode which probably confused people but it was great and revolutionary
load times 10/10 no load times I don't think

Xbox Origin - 6/10, Got some good memories
Xbox 360 Elite - 10/10, No RRoD, Plenty of games
PS1 - 4/10, Very old now
PS2 - 7/10, Own alot of games
DS - 8.5/10, Lost in Blue 2
PSP - 8/10, LocoRoco

 I aprove of these reviews. Probably pretty close to to what mine would be if I had played all the older systems and had never had any biad towards Nintedo when I was younger

Genesis: 7

Gameboy (I'll just generalize them all into 1): 8

Nintendo DS: 9

PS2: 7

Wii: 8

PC: 10

NES - 8/10
SNES - 9.5/10
N64 - 7/10
PS1 - 9.5/10
PS2 - 10/10
GC - 5/10
DS - 9/10
PSP - 9/10
Wii - 7/10
PS3 - 7.5/10 (8 if I were to consider blu-ray movies)
PC - 9/10 - Starcraft alone would push this platform to an 8 for me

Consoles 

Atari 2600= 8/10

SMS= 7/10

NES= 9/10

Genesis= 9.5/10

SNES= 9/10

TG16= 7.5/10

3DO= 6/10

Saturn= 9.5/10

Atari Jaguar= 5/10

PS1= 6/10

N64= 7.5/10

DC= 8.5/10

PS2= 6.5/10

Xbox= 8.5/10

GC= 8/10

360= 8.5/10

Handhelds

GB= 6.5/10

GG= 7/10

TE= 6/10

GBA= 7/10

DS= 8/10

Genesis: 9
Gameboy: 8.5
GB color: 7
GBA: 8
DS: 9.8
Dreamcast: 10
Xbox: 7
360: 8.4
Gamecube: 7.5
Wii: 8.4
N64: 8 *only had for a year was a friends*