For the more than twenty years I taught classes, facilitated workshops and delivered speeches, I was evaluated.  Today my evaluation form is a quarter page (one eighth for Toastmasters speeches):

  Gordon,

   The part(s) I liked best were...

  The part(s) I'd like more of are...

  I'd like you to add...

To those who say, "...but you don't ask for criticism..." I say, "I don't need it.  I'm my toughest critic.  Besides if I keep what they like; extend what they want more of; add what they ask, the good parts improve and the poorer parts of programs disappear.