If you are on the 747-200, you'll probably be able to bid/swap for just MAN flights.
Pay talks ongoing.
340 = 3/4 trips Good destinations (except LOS/PHC) with best social although you never get a sector as an F/O and you forget how to fly, but are very good at making the bunk in the crewrest and fetching cups of tea.
744 = 5/6 trips a month to more boring destinations although you get a few more landings and feel more tired due to no crewrest on the 2 crew atlantic stuff.