Doing backgrounds is an interesting challenge. I've been more accustomed to doing random backgrounds with abstract elemental designs these days than doing actual scenery backgrounds like I used to do more of. The past three years though I've worked more on scenery backgrounds again to try to find that bit of a groove. It all comes down to deciding what your mood and creative process is like at that moment, and then finding what's more appropriate for your composition. Doing either type of background can take a short or long period of time, depending on how much you're willing to put into it. I encourage you to look around and slowly begin to expand your horizons while finding what you feel most comfortable with.Any time.