Time for me to give the blogs a shot. So, I just bought GH3, and so far, I'm loving it. I'm going to post all my top scores/ratings on each song, as well on the progress I've made on other songs. All the songs are on Expert difficulty, and I might not beat some songs for a long while.

The List:

5-Star Performances:
My Name is Jonas by Weezer
Good song. The acoustic line is surprisingly simple. I spent 0 hours 0 minutes practicing this song. Score will come soon.
4-Star Performances:
(none)
3-Star Performances:
(none)
Currently Practicing:
One by Metallica:
30 minutes total practice time. I'm still stuck on the first solo.
Through the Fire and Flames:
2 Hours and 30 Minutes total practice time. I can get 100% on the intro section... On the Slower speed in practice mode! This song will probably require a few weeks, if not months worth of grueling practice sessions if I am ever to beat it, plus a couple more for fine tuning if I want to 5-Star it.