how about a sin city kind of theme, this will set it apart from the others and will make low polygon count not to matter
im sorry to say but most fps are the same, yours could be tottally different if you made it like so
another thins that could added is something much like mirros edge, basically have things such as the wee ninja knives that can be chucked around bright red, add some free running (but in due course)
hav different gadgets, not just a gun and a kinfe, mmaybe even things such as ropes to climb up and down of buildings
i do realise the this would require your own engine which i believe your doing anyway
i believe that if you get a good foundation and get the game to a basic start features such as this which makes the game so much more interesting will be a breeze,
for models you could use real people, or maybe something like iron man the first suit
basically mkae it your own, just dont do anyother fps, large companies focus on profit and so reuse the same thing over and over again, i dont believe this is particularly hard if you have a good engine (irrlicht even, which i did hear was being ported)
ill try a get some screens tomaroow
also you seem like you know what your doing, and this is why i believe you could accoplish this, leave it to more less developed developers to make a traditional fps
