in my past experience, all the bands that i have played in have had, whether explicitly or no, a designated leader. a leader in the sense of defining/maintaining the professional direction of the group, the concept of the music, and the leader of rehearsals. first instinct is to think that the main songwriter should be the leader, because the writer presumably has the best idea musically of where the band should go. however, this may result in a total lack of subjectivity, and the nevertheless important business side may be neglected. ok, so that's the business side. on the music/playing side, i think that almost all parts have a viable argument for leading rehearsals. vocals because they are at the end of the day the focal point, bass b/c we act as the liaison between melody and rhythm/tempo that keeps things together, or drums b/c they are the core of the metric. guitars i'm not sure about. what do you guys do/think? i'm starting up a new band of my own and thinking about what kind of "democracy" i should set up.