coming from someone who knows a ton about bionicle MOCing...
they're nice, but a little cluttered. too may pieces some places, not enough others. i'll be giving a moc by moc critique. this is constructive criticism, please don't take offense
they have good potential.
Matoro:
my favorite by far. the only thing i have to say about him is that the heads on his shoulders are freaky o_O and also aren't toa of ice white? but otherwise awesome
jaller:
really nice as well, but the colors are a bit scattered. red black and orange are fine, but then there's some silver and trans orange as well that visually distract from the MOC. personally i think he would also look better without the toa metru chestplates on his heels. Also, his arms look like they should be bulked up a little bit more. i love his shoulder cannon : 3
kongu:
first off, posing fail. i can't see much of his torso or his right side, which looks interesting, from what i can see, in any of the pictures. past that, legs not being symmetrical don't look that great, and the red and silver clash - maybe get rid of one? arms winder than the legs also looks a bit odd.
hahli:
she looks very nice, feminine. but loose the orange, it doesn't look good on her. maybe if you replaced the light blue limb peices with jaller inika trans orange it would.
also toso's a little too thin
hewkii:
his head;s on backwards o_O
and loose the green, it clashes horribly. the arms also seem a little short for his torso and legs.
nuparu:
not a big fan of mixing gunmetal and silver, but it looks ok here. i see what you were trying to do with the green, but it needs either more or less, not quite sure. in his rear shot it looks like he has a blade on his back? if so can we see it? and i am personally not a fan of asymetrical claws, though it looks on here
so, in conclusion, i think these guys are pretty nice - but need touching up. visual clutter (including blue pins, the bane of my mocing existence) make them not look nearly as nice to me as they should. good job. i'd like to see more from you
