I’m addicted to rock band guitar career big time… I enjoy it way more than GH3.
Hooray for me being a huge nerd and tracking my scores on the rockband section of scorehero:
http://rockband.scorehero.com/scores.php?user=47718&platform=2&size=1&team=0&group=1&diff=4
haha 
[edit] By the way, i opened the rock band guitar (for 360), played one song, and put it in my closet and havn’t touched it since. The wireless les paul from guitar hero 3 is my lover. It’s such a good guitar IMO.