Greg Cox wrote:
Only Superhuman by Christopher Bennett.
(Full disclosure: I edited the book, but it sounds like exactly what you're looking for!)
Thanks for the recommendation! I was thinking the same thing, but I didn't want to blow my own horn. Only Superhuman
is a hard-SF action novel that's decidedly not military; it's more of a superhero novel set in the asteroid belt, which I do think would fall under "variety." More info at the links in my signature.