I prefer yellow because it does not matter the weather - yellow always looks good. Look at a yellow at 95 degrees at 2 in the afternoon - it looks great.
And, yellow daylilies hold their own to other yellow flowers. Compare a red daylily to a red geranium - and the red daylily no longer looks red.
Put a red daylily into a cottage garden mixed bed and the color fades away compared to the other flowers.
Yellow daylilies are easy to mix with other colors of flowers. They are bright and cheerful. I have a lot of yellow flowers in other perennials too.
I tend to like the lemon yellows and saturated "true" yellows better than the gold or orange yellows, but I grow a lot of all of them. Yet, I don't like white flowers at all... of any kind. About the only plants I have here with white blooms are hosta, a couple shrubs, and phlox David. I may have had 3 or 4 daylilies through the years with "white" flowers. The only one I have kept was Dottie Warrell's Frozen Mert. I grew it for perhaps 10 years as "the white breeder" before she named it. Great for clarifying color in spiders, but now that I have stopped hybridizing, even it is gone from the garden. So the very pale yellows (whites) don't appeal to me.
Just love the yellows!
Not to mention that many of the "breaks" show in yellows first...
