Actually what would be less trollish is if one rates all market leaders and their competitors since the NES days.
Here I'll start:
Gen I=
NES: 9.5
Sega Master System: 7.5
Gen II=
TG-16: 7.8
Genesis: 9.0
SNES: 9.8
Gen III=
Saturn: 7.0
PS1: 9.0
N64: 8.3
Gen IV=
DreamCast: 8.5
Xbox: 8.0
PS2: 8.0
GCN: 8.5
Gen V=
Wii: 8.5
X360: 9.0
PS3: 8.0
*rankings and score is my opinion and may vary from other ppl's opinion.
Nintendo console average: 8.9 (5consoles)
Sega console average: 8.0 (4consoles)
Sony console average: 8.3 (3 consoles)
Microsoft console average: 8.5(2 consoles)