Unconventional? You bet.

If there was an unconventional rock group around in the late sixties and early seventies, it was Grand Funk Railroad. Stands to reason it is Homer Simpson's favorite rock group.

All the critics of the day could not understand their popularity. Perhaps the reason for their success was in the quote that goes something like this:

"Just play the stuff that drives kid's parents nuts." I know that fit Grand Funk to a tee.