Wanted to contribute to this thread for a while.
Haruhi in her bunny suit. (Bonus Hare Hare Yukai pose.)
Next, Ayame from the Tenchu series. (I was super duper lazy with creativity/originality on this one.)
I wanted to do Kallen from Code Geass in her bunny suit but I couldn't get the hair color right. It's a weird purple/red.
Wanted to do Yuki from Haruhi wearing a bunnysuit but I didn't like the hair options I had, maybe someone here could find a good one.
I really hope they bring back the bunnysuits and add more colors, I love bunnysuits.
Have a few other stuff I'm working on, only if I stop being lazy maybe I'll get them posted.