Honestly, about military sci-fi in general, I applaud those authors who can make it not feel stilted, regardless of anything else. Like, by the nature of a military the character interactions are a lot more restricted. I wrote one book with that premise-- and a premise made to get the characters more free reign than an usual military mission would have-- and I still felt drained by the end of it. Or maybe I just burnt out. Dunno, civilians are more fun to write about for me.
The word "Uniform" denotes a standardization of equipment and training, so that soldiers of similar types will have similar capabilities. The Romans pioneered it. They won versus other groups not because their soldiers had the
best equipment, but because they were all armed and trained
the same.
Barbarians with their uneven equipment and uneven training tended to get isolated and killed when fighting the Romans.
That does not mean that the Humans (or whatever, it's sci fi) are the
same. Soldiers are quite a diverse lot, with
far too much time standing around and doing nothing. They're generally slightly more tolerant than the Average Citizen because they've been places, seen things, and been forced to work with people from different backgrounds than themselves.
So, to create "interesting" military sci fi, you just create interesting characters and put them in the same uniform. Like all other career-based sitcoms and dramas. Then again, I
like military fiction
a lot, so my taste might not be... normal.
Think of a Draft:
Literally Anyone could be in the Military.