I only grow for pleasure, no hybridizing for me. I started out by just picking daylilies that had pretty faces and colors I enjoyed. Never really took anything else in to consideration. I would always buy reasonably priced ($5-15) named daylilies and NO seedlings
Over the years I progressed in my preferred "wants" in a daylily. I don't always stick to it however when buying, but I sure try.... My spending budget has increased over the years, but I keep the cost no more than $50.00. And that is a rarity, It has to be love at first sight for me to go that high....
#1- Opens well. If it is a named variety I always look up as many photos of it as I can to see how it does.
Hardiness and vigor. I have only lost one daylily over the years (only due to my dog digging it up in winter). Otherwise, I have never lost another. I grow ev, sev, and dor without many problems. As long as I can retrieve feedback on its hardiness/vigor, how it opens and what color consistency it has, I am willing to try it out.
Clean color- No more blotchy, muddy looking flowers if I can help it. Again, I look up lots of photos. Sometimes colors vary and I try to stick with ones that show a consistent color.
Scapes that sit well above foliage, and do not have overly crowded buds. Having nice branching and bud count is looked for too.
Flowers that don't melt too much after a hot day.
Flower pattern ( if it has one) and form consistency is important to me too.
I also keep an eye out for later blooming ones if I can find them. I need to add more of these into my garden.
I still start with the pretty faces and form, then go from there. I started buying more seedlings over the years. Those are a guessing game on how they will behave, but it is fun to watch them age and progress. This year I am trying to limit my seedling purchases because the ones I buy are getting way too pricey for my budget.... I will start putting that money into reliable hardy cultivars instead.
My tastes and wants always seem to progress over the years. But this is how I roll