My least favorite are doubles but all daffs are beautiful. I really love the new modern ones that are two tone and those that have the deeper orange trumpets. But I love the old plain yellow ones too. I could have daffs everywhere in my yard and it would never be too much!
Actually I am trying for just about everywhere because each fall I add some more daff bulbs. This past fall I planted 200 new ones, the year before about 600. Year before that about 200. So you see I just keep on going. I usually plant some tulips also as I love spring bulbs.