Mata: Definitely Kopaka's sword. It just looks awesome without being too complex.
Nuva: Probably Gali's Axes. They had a great look and could be attached to her feet. Also, made a great spear for Norik.
Metru: Onewa's Proto Pitons. Also fairly usable if done right and they just look cool.
Hordika: Onewa again or Nokama's Fin Barbs. Both had great looks, though I never bought either of them.
Hagah: For me, I can't decide. The whole concept of spear and shield is my favorite of all the weapons, and they both look great. I modelled one of my Self-MOCs after the Hagah just because I like their gear so much.
Inika: Jaller's sword was the coolest overall, but I also like Matoro's sword and Hewkii's axe.
Mahri: Matoro's claws just looked awesome.
Phantoka/Mistika: Lewa's sword was very well designed and is a great reminder of his (first) Nuva form. Kopaka's Blizzard Blade is also well designed and makes a great combat knife/dual blade sword, but it's not all that practical being wielded on the end of that massive gun.
Overall, as said above, the Hagah's gear was my favorite. It's what I would wield were I a Toa.
Toa Hagah: Pouks' Avalanche Spear
Out of curiousity, are you refering to his Rahaga form or this image? The latter is non-canon, just something B:NG cooked up in the good old days before it died. It is cool that it is the first result when you look up "Toa Hagah" though.
Edited by Click, May 30 2014 - 03:11 PM.