I find it incredibly challenging to work indoors. I tend to only do it under the most extreme circumstances (i.e. it is REALLY raining outside). Sometimes however I like the results even if they do seem simple to achieve.
I made this image using a blank wall and one 500w hot light. I didn't even bother diffusing the light with an umbrella, preferring instead to just go with it and embrace the harsh shadows that were sure to extend to the wall behind my subject.