Since a year or so I'm pulling my spinnaker singlehanded in anything that I find myself out in.
This is nothing macho, the boat is just more controllable under spinnaker then without one. The first few times it takes some balls to pull it up but when you have gotten the basics down you'll find that the boat really likes being under a spinnaker and so you will too.
The most I pulled a spinnaker must have been around 20 knots.
Wouter