Original Message

Sticky? No. If you have an unwilling passenger for sure it’s a 135 flight. If you have people on board, not company people, That are through their employer are paying for this flight. 135.
If you fly home alone, pick up a company mechanic to show him a track/ balance problem after 15 hours since start time. Part 91.
In utility... fly passengers back and forth from the airport to the to the mountain worksite 80 miles away all day. Part 135. 14.1 hours duty, 8.1 flight time then fly alone to lift a bale of hay for some rich farmer. Part 91/133.

Pretty simple folks