Either the mammoth because it would be fantastic for there to be one and I can ride,
a saber toothed cat because well,
I have my reasons *evil laugh*
And lastly, the Archaeopteryx, it's just a brilliantly beautiful creature. Sadly we can't exactly bring these majestic creatures back. It's just the way things are. Oh well, ;P
Dodo birds!!! I want them to Extinct themselves again!!!!! Lol, they killed themselves. I want to grab some popcorn and watch them kill their own species. Again.