>favourite nation?
Not a nation but my favorite culture(s) are the postclassic Maya, because they're very misunderstood by most people and I'm a massive cunt who likes to 'ummm akshually' the ones who think they were non-existent or cavemen or a declining post-apocalyptic civilization. And also because their mercantile culture and the close religious, political, cultural and artistic ties they developed with the rest of Mesoamerica are fascinating, as is the fact that a couple of their states survived until nearly 200 years after Spanish contact.
>favorite rulers
Eight Deer Jaguar Claw, Mixtec king and warlord from the 11th century, is very interesting to me since he's a thoroughly pre-columbian figure that didn't even get much attention from Spanish chroniclers, and yet we know quite a lot about his simply because he's talked about extensively in many of the surviving mixtec genealogical books.
>coolest cities
Aside from all the big famous ones everybody knows about like Tenochtitlan and Teotihuacan and the classic maya cities, I'm a big fan of small to medium sites like el meco or Tulum, and also cities that went against the stereotype and never really collapsed, like Lamanai, a Maya city that was not only still inhabited at the contact period despite being ancient, but even had (and has) the same name it did since the classic period.
>most /fa/ civilization
For the most part they all kind of dressed the same basic away aside from the purepecha and some cultures that liked being naked sometimes so all of them i guess.