The Collaborative International Dictionary of English v.0.48:

Pleasing \Pleas"ing\, a.
   Giving pleasure or satisfaction; causing agreeable emotion;
   agreeable; delightful; as, a pleasing prospect; pleasing
   manners. "Pleasing harmony." --Shak. "Pleasing features."
   --Macaulay. -- Pleas"ing*ly, adv. -- Pleas"ing*ness, n.
   [1913 Webster]

   Syn: Gratifying; delightful; agreeable. See Pleasant.
        [1913 Webster]

WordNet (r) 3.0 (2006):

pleasingness
    n 1: pleasant palatability [syn: pleasingness, tastiness]
    2: an agreeable beauty that gives pleasure or enjoyment; "the
       liveliness and pleasingness of dark eyes"- T.N. Carver [ant:
       unpleasingness]