Blooms down in the foliage - I forgot about that! That's definitely a Deal Killer, but it's also something that you probably can't tell from a catalog. (I have deleted a few such daylilies from my garden.)
Buying daylilies for names alone... Hmm, I have come close to that, but I'm not sure if any of mine were bought solely for the name. I'd have to go through the list...
I do remember buying 'Sears Tower' both because of the name (it is a building in my hometown, so it is a sentimental sort of thing) and because of the tall scape height. (I had just started my search for daylilies with tall scapes, and at the time, 'Sears Tower' was maybe the tallest tet available; at least, it was the tallest one that I knew of.) I keep it because I like the flower (for a lot of reasons), the bloom season, and the foliage (even though, still in a pot, it never attained its registered scape height....though it is tall enough).
I guess you could say that the name can be a factor in my purchases, at least if it comes down to choosing between two similar daylilies.