Personally I feel it was the n64/ps1 era, 

SNES vs Genesis

unless i see few hardcore atari and coleco fanboys arguing i have to say SNES/GEN

XD. Epic post. And I fully agree.

yea that SNES/GEN must have got the kettle brewing for the PS1/n64 battles

SNES vs. GEN

I thought it was way back but I guess it is SNES vs GEN.

there was always PC fanboys Vs console fanboys since the beginning of time

Generation?  I think we can narrow it down to the commercial.

Seriously, the "fanboy" wars were basically started by Sega as a marketing ploy after the Genisis couldn't dethrone the NES in japan despite being way more powerful and graphically superior.

It worked too... it's also what started the "Nintendo Systems are kiddy" stereotype.

yo absolutely Genesis vs. SNES