Nice work, love that old robotech feel you've got in there. It could use some more white in the back to balance it out, maybe on the shell for the dual vent/thrusty bits?
If you're developing for modern pc or console it's a drop in the ocean and can basically be ignored Basically, every vertex on a seam is duplicated for ever shell it is part of. Its the same with hard normals
If you need a theme, I'd go for Sci-Fi. Something like Tron or Ghost in the Shell or Futurama's Interweb, basically Virtual Space. Or Death of a God The Betrayer Bounty Hunter
man, how are you doing the tiled spike things? like the overlapping shell parts on the head spikes, and the arms? you're not doing those all individually are ya? what's the method?
when you unwrapped it, is your smoothing groups the same as your uv shells? from what i see your smoothing groups are the cause of your normals baking incorrectly.
It's sometimes a better idea not straighten your UV shell and work to the shape that works best. It can be a pain, but at the expense of a little extra texture work, it's worth doing for a better result.
I'm half korean but native of south korea, so naturally I'm all about it, there's a huge market over there and spilling it on to us here in the states only mean more jobs.