If you had to replace our diet with the diet of a different animal

[blackmage_nuke]

I'd go for grizzly bear since I like raw salmon and would like to eat it without worrying about bones. And there's a variety of other meats in their diet so I don't get bored.

On the other hand it would be great if we were like cows and all that was needed to survive was grass. You can get that almost anywhere.