I voted "all of the above", and have performed in many bands over the years myself. As a rhythm section member I would always emphasize locking with the drummer and focus on laying down the foundation as the bass player.
Music is essentially theater in my mind, the lyrics, the melody, the rhythm, the vocals (if applicable) all combine and interact with my soul, my being, my essence. Music is very chronological for me, I can relive a memory, a place in time, by simply hearing a certain song, it's very powerful and spiritual for me.
Cynthia -