No. I will suggest a 360 over a ps3 if it suits someone's personal preferences more than the ps3 or Wii, even though I hate the 360. I hate the 360 for logical reasons that apply to me, but that doesn't mean I'll bash 360 games I haven't played, or call all PS3 games better.
Having a preference doesn't make you biased.
Currently playing: Uncharted: Drake's Fortune, NBA2k11, Metal Gear Solid, Picross 3d