Seems my kids went through stages like that as well. My son discovered the Beatles (elementary school), Middle school it was SOAD & Linkin Park (metal phase) then on to classic rock like the Who & Stones (High School) but has now gone on to Minutemen, punk & Indie rock, like the Shins, Broken Social Scene & Black Keys.
For me as long as its well performed, it's all good. I could never stand listening to the same type of music 24/7