I'm only a "PS3 defender extraordinaire" when it's being targetted. I've also been an "XBOX 360 defender extraordinaire" when PS3/PS2 advocates target it. Unfortunately my experiences have me dealing more with PS3 attackers than XBOX 360 attackers. Though it was the other way around this generation (I did my share of XBOX defending).
As for advocacy of my "favourite system," I plan on purchasing neither the PS3 nor the XBOX 360 (or the Wiii for that matter). Neither side has my support, nor will they receive my money. I care not for either system. Just like I did not care for the PS2 nor the original XBOX. However, if I were to choose a console I 'preferred' from the current generation, it would be the XBOX. This is because, as a PC Gamer, I recognized that the existence of the XBOX could mean that games made for the XBOX could easily be made for the PC (given their similar hardware). I recognized the fact that the PC gaming market is significantly smaller than the console market, and that the advantages of having a console similar in spec to the PC could result in a benefit for myself.
If you want to refer to any bias, then refer to it as anti-Epiphany bias, not PS3/XBOX 360 bias. After having him insult my intelligence by regurgitating Microsoft press releases and saying such gems like "I believe there is far more code than simple "choice" strings that
create a fully dynamic and robust AI" and "There is no GPU in the PS1 or PS2," all the while ignoring posts that reference interviews such as the EA one (mentioning that the PS3, and specifically the Cell, would be useful in procedural animations such as those in Spore), as well as Tim Sweeney's comments and whatnot. He wrote them off as being in Sony's pocketbook and therefore not being valid comments at all. To top things off, he tried coming back and tooting his own horn by starting this very thread.
I couldn't give two ****s about which console wins or not. I do however, follow their technical aspects a little bit because I am an aspiring game developer. I recognize that my career choice may in fact have me developing for these systems.