This is a tough one, because I can't possibly pick a favorite given how my moods shift. So I'll try and come up with a top five. These aren't ranked order, just the first that spring to mind:
1. Big horse belly (taller than me but not giant)
2. Same-size human belly
3. Fellow wolf belly
4. Rabbit belly
5. Reptile belly (includes gators, dragons, lizards, etc)