I have had both Peking and Ancona ducks. I loved my Ancona's, but like Porkpal said don't get too many males. I bought a couple of Anconas and had them for about 5 years, I just gave them to a friend this summer. I let them raise one brood of young. She hatched 7 little ones, 3 females and 4 males. Her first year laying eggs she produced an egg all but 4 days. In later years she slowed down, and this year she layed an egg every other day for most of the spring. The eggs were very much like chicken eggs in flavor. I had to keep them fenced in here because of the critter dangers. They are messy and love to muddy up their water.
They now live on a farm with a large pond, and are really happy.