Making your giant fighting machine anthropomorphic, or at least zoomorphic, is cool.* You can however go overboard and make it too zoomorphic, giving your fighting machine vulnerabilities that a non-animal-shaped machine wouldn't have.

In the right context, this could also be cool, of course.**

* Nonsensical, but cool.
** Even more nonsensical, but even cooler.

Transcript

Rebel Trooper: The shots are just bouncing off!
[SFX]: Pow!
[SFX]: Pow!
[SFX]: P-tang!
Leia: Aim at the eyes!
Rebel Trooper: They don't have any eyes.
[SFX]: Pow!
[SFX]: Pow!
[SFX]: Pow!
C-3PO: Aim at the you-know-whats!
Rebel Trooper: They, uh... don't have any of those either!
[SFX]: Pow!
[SFX]: Pow!
[SFX]: Pow!
Leia: What kind of crazy camels are these?
GM: They're armoured tanks!
R2-D2: —Armoured tanks!
GM: Stop that.