Most covers bands that do the "let's play what we want and all choose our favourite songs rather than doing sex on fire, it's our band not my band" never get out of the rehearsal studio, I've been in many of them.
I like a band leader but they've got to be open minded to everyone's suggestions, I've been in bands where we had a band leader but they wanted to play obscure B sides that no one else knows or really likes. Again they never did a gig.