Some fellow controllers have 3 airplanes on the frequency
Sometimes those three can make you a lot busier than 20 all streamed and seperated.
What annoys me is (usually as you are about to turn the three for an intercept heading) someone who just launches in with their life story.....and the three sail through!
OR.......the little hellos and private messages some guys think it is ok to pass to each other.Really bl**dy annoying!.