Gumbo is not difficult so much as deliberate. You begin with the roux and give it your attention, stirring until flour and oil darken into something that smells nutty, deep, and just a little dangerous. From there the pot starts to build itself: onions, peppers, celery, stock, sausage, chicken, okra. By the end, the broth tastes like it has known what it was trying to become from the start.
The dish asks for patience more than bravado. A gumbo with a pale roux can still be pleasant, but it will not have that characteristic toasted depth that makes the spoon keep returning to the bowl. White rice on the side is traditional, hot sauce is optional, and a little file powder at the table is a very good thing if you have it.