Bass: Expert Guitar: hard (most of the time) Drums: medium (Favorite instrument) Singing: easy (I hate singing. Except Dani California) I don't play these kind of games any more even though I used to be obsessed. I like drums the best (Hit stuff) but i am best at bass.
Guitar - Expert (I can gold star or 5* pretty much everything but Thrasher, Caprici di Diablo and Rude Mood) Bass - Expert (I have FCed 74 of the 84 RB2 songs on Bass, including Ace of Spades, Souls of Black and Shoulder to the Plow) Vocals - Expert (I FC Painkiller every time, and I'm really close to Tangled Up In Blue) Drums - Expert (Lots of golds, a bunch of high tier 5*s) I haven't gotten around to any multitasking though.
Bass: Expert Drums: Hard-Expert depending on the song Guitar: Expert Singing: Hard-Expert. I wouldn't really consider bass and guitar to be much different, but that's just my opinion. EDIT: I have done singing and Guitar, I normally lower the difficulty on singing when doing that.
Guitar: Expert (Hard on the ridiculously challenging songs.) Bass: Expert Drums: Hard (Medium if it's a tougher song.) Vocals: Expert I don't really play much, but I'm pretty good at it...