Isaac Asimov did PoV switching all the time and his books are highly succesful. I would say that it is only annoying if the switch is done poorly ie. the reader needs to know when you switch. I think it sounds kind of cool, I prefer the officer though it seems like there could be more room for growth with that character and a deeply engaging storyline. My second choice would be the basic soldier. I would advise you to not go with the other choice, the criminal, because as a writer your job is to draw the reader in and get them engaged with the character and it helps if the reader can see themselves as said character. With the criminal who commits crimes and murders and tortures civilians it would distance the reader from your work and even if the rest of your characters are engaging and thought provoking, that shift into a radical extreme will just pull your readers out of what was hopefully, a good read. Good luck with your work.
Also, speaking as a reader now and not a writer, I always find it interesting when the different PoVs intersect for a kickass climax. Which, if you decide on doing, would turn out smoother with someone who wasn't a ruthless killing machine.
Also, speaking as a reader now and not a writer, I always find it interesting when the different PoVs intersect for a kickass climax. Which, if you decide on doing, would turn out smoother with someone who wasn't a ruthless killing machine.