Dorms
    sharing a room
      sleeping
        woken up at night
        woken up in the morning
        snoring
        
      safety
        lockers
        
      socialising

      cleanliness
        drying clothes is a bit harder, without encroaching on the space of others.
        
      shared bathrooms
        limited shower space
        running out of hot water
        
      costs
      
Private
      sometimes cheaper for two people.
        
    cheaper for one person
    different lifestyle - see "Life in Dorms"
    noise / decent nights sleep
    on the road for months - sleepless nights start to add up
    single sex vs mixed