Every time I have a bad day I start second guessing my whole style of play. It doesn't help that I recently got Poker Tracker and it classifies me as loose-aggressive. I always thought I was a pretty tight player, so I don't get what it uses to classify me as loose, but it definitely surprised me.

Is Poker Tracker a fair evaluation of ones play? Should I be looking to adjust my style of play?.... What does Poker Tracker even use to decide how tight or loose I am?

What about other metrics? I use a session logging spreadsheet that tracks "Win Rate (BB/hr)" and "Win Rate (BB/100)" ... what are these and why are they important to me?