Seeing as 95% of my shots are outdoors, I'll have to go with that. I much prefer the natural lighting and scenery, and the challenge of getting the scale right. It also allows for much greater depth of field, and location shoots can be truly spectacular if you can find a great locale. However, indoor shots certainly have their place too, especially for night shots where the distant background isn't important and the lighting will be artificial anyway.

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"The future's uncertain and the end is always near." - The Doors "Roadhouse Blues".