^I think you have Spire and Trace confused. Trace is the skinny red one, Spire is the big rocky one.
Here are my opinions on the Hunters excluding Spire:
I think Weavel is very cool as well. His past is excellent, and I love his hair xD I might wear mine like that once I grow it out. The Battlehammer is great, and his Alt Form rocks. Great for enclosed hallway spaces >=P Plus, you can attack your foes while finding energy, weapons, and ammo at the same time. Excellent =D
Trace is fun. That really sums it up. He's not my personal favorite anymore, but he's still great to use if I decide to just kick back and kill. The Triskelion is deadly, and the Imperialist is cool(I've learned how to use it, finally). His design is excellent, though, which is why I liked him so much in the first place.
Noxus....Meh. Sometimes I just feel evil and like freezing my foes with the Judicator and slowly killing them. But generally, I don't like using him. His design is nice enough, but his character is really dull, and he's basically just a male Samus, albeit a bit harsher. The Vhoscythe is frustrating, really. I do like how you don't need to stylus to change directions and how the scythe keeps spinning instead of stopping after some time, but when you hit something, it takes a while for the scythe to extend again, and by that time, you're dead. And sometimes it doesn't even extend, because you hit the button too early. Annoying in so many ways.
Sylux: Ugh. I really don't like this guy much at all. His past is horrendously cliché. He hates a powerful company(if that's the word for it) for no apparent reason and devotes his life to destroying it, etc., etc., etc. Your standard villain here. It's a shame he acutally looks cool, because I don't like using him. The Lockjaw is all but useless, with its difficult maneuvering and out-of-control Bombs. Difficult to get it to turn, difficult to get it to stop, and seriously not worth it. Sylux's weapon is great, but I like using it on any other character more, and then, it colors their guns a cool electric blue(Spire's looks particularly awesome). Sylux's cry is kinda cool, though. Gives you the impression of some beast inside the suit.
Kanden: Cool, just cool. His backstory is pretty cliché, but he's a great Hunter and a force to reckon with, even as an AI. The Stinglarva is a jack-of-all-trades Alt Form. Fast, easy to use, and powerful. Kanden himself is pretty good, too. Large, but not so much as to present an easy target. Fairly nimble, and has a good weapon to boot. His design is great, and he's yellow

I actually forget about him a lot, seeing as I like a lot of the other Hunters, but he's still great to use when I feel like using him.
It's really a shame that Nintendo put so much effort into most of their Hunters(I'm looking at
you, Sylux), because I often can't decide who I want to use D= Usually I choose Weavel or Spire, but then I get the urge to choose a different one, and I end up swapping Hunters until hours have flown by.
~*CB*~
The 8th Champion