Omigod, that´s quite a lot to think about! :) Font - well something which is easily readable and a bit more fun than the regular one.

Colors - there should be more colors. Away with the black, in with clear colors like red, blue, green....

I was out searching for Aztec themed images and it´s not that easy to find. Various pics of Tenochtitlán is available, so why not use one of those. The one up there now I just put it there as a change while we work with it.

The hoods should be featured somehow.

Rp - sofar I have too little knowledge of this culture to be able to make good suggestions. Generally my opinion is that rp should be firmly base in history with enough license to make it fun and interesting.

Nothing really concrete here I´m afraid. Just a start ;)