It's time to leave a band when the Band spends more time talking about what they should do rather than actually doing it or...
When one or two of the members go off on an ego trip about who's band it actually is and who started it in the first place. (If that's the case then why did they need other people to join them)...or
When you feel you are being treated with no respect for the effort you are making.....or
When the Music being played no longer makes you happy...that's a crunch point.

That's just my own personal opinion mind you so make of it what you will or don't!!:) I only work on projects with various Musicians rather than just a fixed group of collective Egos....hey it ain't a dirty word, we all have one. It's just that some folks egos are bigger than others and so sometimes that makes it hard for the other Band members to be heard when one or two big egos out of say four egos in the band are taking up so much space on the stage or in the Studio.**smile**

All Bands are not like that however. Some Bands are great and get along just fine and enjoy and respect each others contributions. The audience can hear that in their Music.
It is at the end of the day all down to the personalties of the members I suppose.

I hope all works out well for you whatever you decide to do.
If this ain't the Band for you....there will be another one that is.
Jude