1. 24 hour reception for people who take the night train and arrive early in the morning … or late at night.
There is nothing worse than arriving to your hostel and finding you can’t even get in the front door until 9 or 10 a.m. That makes 4 a.m. arrivals miserable. And, there is nothing comfortable about sleeping on a front step of a hostel in a new city. For me, a hostel that doesn’t offer 24-hour reception is a deal-breaker. I am fine if I can’t get a bed right away, but at least let me in off the street so I can put my bag down and close my eyes in a safe environment.