As you know, the site keeps track of your highest scoring instrument and career score, most played genre (with a few songs you played a lot), and "signature performance" on that instrument, and proudly displays it for the world to see.
As for me?
Scores highest on: Guitar, 26.6 million points
Most played genre: Metal (showing Before I Forget, Ace of Spades, Here I Go Again, Two Weeks, and Red Devil)
Signature performance: Timmy (FC)
I am ashamed of this. I got that massive score playing for HOPO-Cidal Maniac. Ever since getting the Pro Guitar, ye goode olde five-lane mockery of guitar is beneath me. No offense to five-lane players, only to the mode itself. That massive guitar career score will not be bested by any other instrument any time soon, and has become something of a white elephant for me.