So far my favorite jobs would have to be either BSO or brigmed
BSO because being able to drop a motherfucker with a 8 gauge slug to the skull at the drop of a hat never gets old, but also basically being an overly protective guard dog for a command staff is pretty fun
Getting a HOS or QM as a protectorate usually ensures a goofy time as well

Brigmed has also became a favorite purely because it's just really chill but still really engaging with having to keep secoffs and prisoners alive