I'd love to give this a shot!
I usually play expert guitar, but I'm no stranger to bass and vocals (both expert as well); the only instrument I can't play expert on is drums. I have a decent amount of music background, have experience as far as determining the timing of notes in songs (used to chart for fun in a freeware DDR-style game), and can tell pitch reliably well. I have very open musical tastes and would be willing to give anything a try; from country to death metal.
I usually play RB for at least 5 hours per week, homework permitting anyways, and have bought DLC semiregularly (I'm up to around 350 songs in game, which isn't much if compared with many people, but is as much as I can afford to buy). I also have several friends whom I play with locally, and could get their opinion as well.
My gamertag is Trexxen.
Thanks for the opportunity to help the community!