My favorite armor design was Pussyface's. It was completely different from all of the other Predators. It was bronze instead of silver. It had such cool shapes too, almost like an insect instead of Anytime's "futuristic spartan" look or Scar's samurai/knight look.
Pussyface's armor looked organic. It had curves and everything had ornaments on it. Plus his plasma caster was so different looking too. It was flat instead of gun shaped.