Great topic, Rick--

Michael K hit on all of the real biggies--and I think that everybody who has worked in groups for any period of time at all had had to deal with each one--Though I can add a bit more, I think...

Differences on how much rehearsal time is needed and how seriously that time should be taken--

Differences on when new material is needed, and on what material is appropriate--

Differences on what constitutes a good set list--

Differences concerning the presence and involvement of outsiders at rehearsals, backstage, and in transit--

I think I used up all my good stories on other threads--except maybe "Mr. X", who was a "crooner" that I accompanied--he had a nasty habit of singing in a key other than the one we had rehearsed in, even though it was the one I was playing in--he also would rehearse songs to death, and then perform songs we had not rehearsed at all--

Did I mention my "Songwriters" band that ended up doing mostly covers because the other songwriter only had six tunes that were actually playable, and so he refused to play more than six of anyone elses songs?

There was the "Gypsy" Band (sorry about that, Larry) that I got fired from,half-way through a Ren-Faire season--they then came back and tried to borrow my music folio, because the other musicians were classically trained, and had just been reading from my arrangements--