The ability to wonk silently without the use of mogs. The ability to wonk discreetly (if you are female). Finall ythe most important attribute: keep yer mouth shut!
Also add if you have a window exit next to yer bedspace it is a great way to evade the ord NCO who is coming into the block looking to dick a duty replacement.#
I would love to add "the ability to abstain from long term practised masturbation. That would be asking too much....
Time management when the rest of the troop is in the NAAFI in the morning break piss over to the block when it's quiet and get the washing/ironing for the next day done. Saves fighting over who's go it is on the ironing board that night