He wanted a straight, direct answer on an important issue, and he wasn't going to give up until he got it. I'm glad that he did, because the whole thing about the President being able to randomly use drones to murder people on American soil without a trial is sort of a big deal that needs to be addressed.
I think that what Rand Paul did was a service to the rest of the country. People in this nation should have very serious concerns about the drone policy of the Obama administration. The least he can do is to perform a filibuster until the question is answered regarding killing US citizens.
Much like everything else Rand Paul does, this was pathetic and done for no reason other than so Rand Paul could inform you that Rand Paul was doing something. Much like his father he lives on another planet and thinks some combination of lunatic ideas and outdated politics form something worthwhile, it's legitimately unsettling that people take this turd seriously.
While there are many concerns to be had about the Obama administration and its policy of using drones to kill American citizens overseas, I think what Rand Paul did was foolish and short sighted. He held up government business for quite some time so as to make a statement, while not solving anything.