For newcomers (do I have any newcomers? I'd really like to have newcomers): once in a while I'll toss an idea into the tubes, just to see what sticks. Sometimes the ideas are sticky... and sometimes they just need to be hit by a stick.
A question that occurred to me on the way home from school: what would the story implications be of a science fiction in which the obligatory force field technology had two main flaws: firstly, the force field has to be a sphere, and secondly, the object that produces the force field needs to be outside the area of effect? Other than the obvious - some really interesting design choices for warships - what else would be true? What style or feel of space combat would these limitations produce? What else is not occurring to me?
Post if you've got 'em.