I've been here for 10 years, and have accumulated quite a few favorites. Probably around 25,000. In that time, I have noticed a few things that would make the DA user experience better.
1) In notifications, add a little red dot to deviations you have already favorited. I sometimes have very slow downloads, and end up wasting a lot of time opening deviation & deviation group stack notifications that I already have. As I said, around 25,000 favorites over 10 years, so as old things get added to new groups, I really should be able to delete things I already have from the thumbnail without opening it. If there is a little red dot that tells me I already have it, I can delete it right away.
2) The ability to to add a deviation to a specific favorites folder from the thumbnail without opening it. It eats a lot of bandwidth having to open every deviation in order to add it to one of my favorites folders.
3) Move the button that alters your watching status for an artist away from the button that deletes the deviation from your notifications. I delete 90% of what comes over the feed on any given day. And my thumb frequently accidentally hits the button to alter watching status instead of the delete button. I dare say in this day & age, that more people are using DA on smartphones than on PCs. Thumbs often hit the wrong button when they are right next to each other. Opposite corners would work better.
4) Allow users to change the order your favorites or deviation folders appear. In a fit of enthusiasm, you create a favorites folder for specific things. Then, times change, and you are not putting that much into that folder anymore, but using more recently created folders. But you have to scroll past all those little used folders to get something in the right slot. If you could rearrange the order of your folders, the way you can your bookmarks on your smartphone, you could move your more heavily used folders to the top, and the less often used ones further down. Saves time.
And while I am ranting, what the heck is the point of a Llama? I used to take the time to politely thank everyone who gave me one, and give them one in return. But they seem to be completely pointless. Now I just feel guilty for rudely ignoring them. But I just don't have the time for it.