on our Truimph cruise, we booked a balcony on deck 7 right next to the suites. so yo're mid ship a touch away from the elevators as private as a balcony can be. In addition, on deck 7 you don't have to mess with the elevators much unless disabled. two flights up you're on the main lido deck where everything durring the day happens, at night go two floors down the the promanade on 5 so no waiting. plus I've found that booking near the suites gives less hallway noise than deck one or two, take the comment as you will, it's my experience.
)now our cruising buddies had and aft (back of the ship) balcony. but the diveders go on a slant and if you're standing at the beam to the ocean you can see in the others balcony's, not true of mid ship. the extra space comes at the privacy price.
you'll love the triumph and the itinerary- consider the bio bay or just walk the town, keeping with the tourists, no dark streets.