As much as I'd love this because I'm on staff (lol. xD), I have to say I'm against it. :x
We have enough recognition with staff items, and giving us our own pets is unfair to the rest of the res community. If I wasn't on staff and didn't have the talents to be, I would surely find it unfair that staff could have creatu designed for themselves. Not only that, but staff work for the better of the site. Sure, some might work for credits (which is a privilaged bonus), but I'm also sure there will be some staff that will just work to have that creatu of their own on the site. I think staff is here because they want to help Res and they love it, not because they can work for something that others can't get such as a pet.
If anything, I just think having our own creatures is a strain on the artists, as many staff will come and go, and it is a little extreme. Items are good enough for our work.