I pretty much run my band. I'm band manager, as well as band manager for various other bands, a booking agent, promoter, and working on starting my own minor label. I don't mean "I run my band" in a bad or conceited way BTW, I just mean, I started, I've written the lyrics and bass for our songs, and I manage us. Everyone contributes, and does their fair share. And most of all, we all get along and are good at what we do.That's a good way to be!
On a related note, I think I'd be horrible in a band. I like to do everything my way and by myself and, wouldn't you know it, you just can't do that when three or four other people are involved! I could probably be part of a duo, but I think even that might be a stretch.