I usually read several reviews and if they agree on a common trait (good or bad) I will factor that into my buying decision.
I dont think anyone should ever rely on *one* reviewers opinion.
Latest example was Tenchu Z. I was looking forward to getting it right away but all reviews Ive read pretty much agree on several negative points.
I still would like to play it, so I will probably buy it later when its in the bargain bin. ($20 or less)
PS360 ftw!
Currently playing..........
Gears of War 2, GTA IV Lost and Damned, Little Big Planet (Yes I said I had no interest but my girl wanted to try it and we did and now Im hooked )