I'm not all that convinced by career mode so far. Early days, but all I've had so far is sightseeing missions, which are deadly boring - follow the blue markers, even when they tell you to hold short halfway along the runway.
Also it keeps giving me weird penalties, e.g. for not using my landing lights during a night take-off/landing, except I haven't got night certification yet, it's daylight. In the last one I kept racking up airspeed penalties, but it never explained why.
Think I might throw in a barrel roll on the next flight, see how the robo-passenger like that.