I like this question. Today, I am a warrior who gardens. Having written a few short stories with that thought as a theme I always began the story with the conflict - present day setting, science fiction, or near medieval days. Then the setting changes to the central protagonist is gardening and dignitaries arrive who he knows. They are seeking his help because of a unique skill - sniper, pilot, or knowledge of magic.
So, today, the warrior theme is much more orientated to being a veteran of many wars now passed, having a disdain for conflicts being fought, and being faced with deciding using unique skills for good of the common welfare of a land of people. Interesting plot themes can grow from that. The warrior protagonist essentially does not choose a side and only acts through loyalty first to his immediate community ties and then patriotism to the land for surviving no matter the aggressor.