Proof that the taste of the American public and/or the chart formulas are suspect: check out the Billboard album charts from one, five, ten, or fifteen years ago. Or the singles charts from one, five, ten, or fifteen years ago. I used to think that the British charts were a better indicator of quality, until the BBC released its list of the 100 top UK #1 singles of all time.
I'm slowly learning how to play the guitar. Harmony Central maintains an extensive database of user reviews of guitars, amps and effects units.
Here's a (very short) list of guitar tabs I've written. It may or may not be expanded as time allows:
allmusic.com is a good source of album reviews.