The appeal of dandere is that they're not complete bitches, they're not quite as emotionally immature and their reluctance to show their dere is the result of characteristics that everyone can sympathise with (shyness and fear) i.e. "weakness" rather than unsympathetic characteristics such as pride and haughtiness.
I mean, hen I see a tsundere, I just want to kick her in the cunt. I don't care about her problems; she's a bitch. When I see a kuudere, I'm inclined to ignore them for the same reason that I'd kick the tsundere in the cunt. But when I see a dandere, I just want to give them a hug ;_;
I'm trying to be a little more objective than that you realize. As many genuinely like Tsunderes, one needs to compare their appeal to the other "Dere" archtypes. What is appealing about a Tsundere, a Kuudere, a Dandere, etc.
But I suppose that reasoning works for you as long as you don't carry it beyond the personal level.