- Nope, I have always just tried to land the fish as fast as possible, regardless of head up. 
- Yes, If I mis-hook a fish and he's sideways I just horse him in and release him or loose them 
-N/A 
- I have fished without a net on small cutty streams, where I am using barbless hooks and committed to the dry. Reason, less things to carry and I have a  horrible fear of bears and have convinced myself that a fishy net might bring unwanted friends ( total BS but when fishing alone my mind sometimes plays tricks on me)