Supply and Demand - What do you need?

It never ceases to amaze me which pictures get much attention and which seem to disappear. And I fear I will never truly understand the dynamics of deviantart. I can't create a poll, so I thought a journal would work better than nothing. I ask YOU, my dear watchers and everyone who reads this:

What do you need?
Which animals would be great in a manip/drawing?
What kind of stock ISN'T needed?

If you have an idea for digital art and you need specific animal stock, just make a sugestion. Surely I can't take photos of every living creature, but sometimes it is easy and I simply didn't think about uploading or even taking a photo.

That's it, basically. Now, enlighten me
Not to forget, a small selection of art that included my stock