It really was mostly because the AT-AT looks more scary/badarsed.Metahive wrote:I still wonder why they ditched the much more practical AT-TE for this "elephant".
I guess when you're in the Empire's position, you can afford to make silly choices like that, supported by the fact that the AT-AT does have a phenomenal service record in spite of all its inherent flaws.
Out of universe (not that it matters, just in case anyone's interested), the whole design was because Uncle George wanted something besides tanks. He decided to give it long legs so speeders could fly underneath it, giving the battle a 'dramatic, 3D feel' or somesuch.
While I'd agree that the underside is quite underdefended, getting beneath an AT-AT is easier said than done. Just try running across a battlefield with that thing firing at you. Luke was only under one because he crashed his snowspeeder there.