Basically, I have a problem with the "don't redistribute" part. CC BY-NC-ND allows people to redistribute as long as the image hasn't been altered, they're not doing it for profit, and they give proper credit to you for creating it. Your policy makes it technically illegal for me to send a copy to a friend. I have to give them a link and, if you've dropped off dA, then anyone who wants a copy is screwed.
That's your right, but there's a large body of research showing that saying "don't share it" has little effect. (Those who really want to share it will do so. Those who would obey you forget who said what about which images in their collection)
As such, for non-commercial use, it becomes more a declaration of how you interact with the community rather than an effective instruction. That rubs me the wrong way for many reasons and my response to that is to "take my business elsewhere" since "usage constitutes endorsement". (Which is why, aside from games and my video drivers, my system runs only freely-redistributable, open-source software. Linux and such)
In essence, by refusing to allow redistribution, you're staring a lot of people in the face and saying "I spit on the aspects of 21st-century culture that you hold sacred". If it really matters so much to you, stick the URL to your deviantArt profile in the corner of each image. We respect the desire to use a license like CC BY-NC-ND (Attribution, Non-Commercial, No Derivatives) whether or not we agree with the decision, but the decision to refuse redistribution rights appears to us as ineffectual and pointlessly stubborn as an grumpy old man trying to stand in the way of a tsunami and as anti-social as "Get off my lawn, you damn kids!"
You really shouldn't care so much about whether I choose to let people spread my work or not. I'm not an idiot so I obviously know that people are going to take my images whether I want them to or not, but saying it is OKAY to do so just encourages the spread of my images with no credit. People don't bother to read what type of license things are under so it's easier for me to just say 'DON'T TAKE' than to type out an explanation of how and when they can use it. Besides, why is it wrong for me to want people to come to me to use something that -I- own? I'm sorry you don't agree with my choice but there's really no need for you to wag your finger at me. I do own these images and if I choose to ask people not to take them how is that not my right?
I'm not saying it's not your right. I'm just trying to convey the reaction that people like me have... though that may be just me treating you the way I'd like to be treated. (Trying to help you understand my point of view)