Re: Q Who? - What were Q's Motives?
I'm not really sure what you're getting at, since both Picard's & Guinan's views are correct -- from their respective points of view. They can also both be true, without negating each other. And, isn't option 3 really restating option 1?
I think it's pretty clear that Q's motive is to show Picard that he could be a useful member of the crew, even if he had to stir up a hornet's nest to do it.
To strive, to seek, to find, and not to yield.