Going backstage at any fashion show can be an exciting experience, but after many years it becomes more and more challenging. Everything starts looking more and more the same each time and you're pushed to come up with pictures that not only tell the story of what's going on, but to capture pictures that don't look like your last.
I also don't always get to do what I want backstage as I'm often shooting for clients with special requests and need to deliver on those as a priority, but that's what being a successful photographer is about. Knowing what you 'need' to do and putting it above what you 'want'.