I love making characters out of unconventional/normally NPC occupations. A while ago I was thinking of making an FPV drone pilot who fights using weaponized and kamikaze air drones. Though I don't think that would be much fun to write against, haha! Otherwise, one unconventional occupation I already have a military speeder bike/swoop
jockey, who basically fights using her speeder bike as a weapon in and of itself, kind of like a fighter pilot and their starfighter. I wrote a pharmacist and a droid technican on another site as well, which were both really fun to do. However, that was a roleplay environment which was more conducive to those kinds of characters.
Would love to hear from others who've written characters that have unconventional occupations!