Jet is less efficient per HP than prop.
Jet + :
Shallow draft operation, throttle response, fun factor, most jet boats well laid out for day tripping, easy maintenance
Jet - :
Susceptible to weeds (can be an issue in inland lakes), less efficient per HP than prop, most jet boats have low freeboard (i.e. "sides") limiting them to small lakes/calm water
Prop + :
Simplicity, more efficient per HP than jet, prop easy to change/swap if damaged or to change pitch for performance, wider variety of hull styles
Prop - :
Potential for prop/lower unit damage in shallow water, need to be concerned with lower unit in addition to engine/powerhead
Outboard + :
Reliable, simple, most made in last 20+ years are oil injected, lightweight, best on sub 19 foot boats
Outboard - :
Well and mount can waste some space, can be cold-blooded
Stern drive + :
Easy operation, powerful, generally quiet, reliable, can be more fuel-efficient
Stern drive - :
Most work to lay up for offseason, same shallow water issues as outboard,