I'm not a big fan of first person POV in storytelling, and many of my favorite stories feature an ensemble cast. This is because the characters I'm most drawn to are fence-sitters. They are not necessarily indecisive, but they do tend to play both sides of a conflict and keep multiple options open for themselves. I always hope they'll choose the protagonist's side in the end, but a good storyteller will keep you guessing throughout the tale.
I believe most if not all storytellers will agree that characters are important to them. They also will probably agree that characters are important to their audience too. But when it comes to the interpretation of a character, who's input is more valuable?